Practice test

Wbcs preliminary (general science) sectional test - Test Set 1

Review 250 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

250 questions

Questions and explanations

  1. Question 1

    Which of the following pairs comprises of the smallest and the largest endocrine glands of human respectively?
    1. Pituitary-thyroid
    2. Thyroid-pituitary
    3. Pineal body-ovary
    4. Pineal body-thyroid
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  2. Question 2

    Two drops of liquid merge to form a single drop. In this process energy is:
    1. Absorbed.
    2. Released.
    3. May be absorbed or released depending upon the specific heat of the liquid.
    4. Neither absorbed nor released.
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  3. Question 3

    Which is the reducing agent in the thermit reaction carried out for repairing of the railway track?
    1. Iron oxide
    2. Aluminium metal
    3. Aluminium oxide
    4. Iron metal
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  4. Question 4

    Identify the substance which can dissolve in water:
    1. Glucose
    2. Urea
    3. Acetone
    4. All of the above
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  5. Question 5

    Mg (s) + O2 (g) → Mg (s) + energy, this reaction may be classified as a/an:
    1. Combination reaction
    2. Oxidation reaction
    3. Exothermic reaction
    4. All of the above
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  6. Question 6

    A drop of water is broken into two drops, The sum of which property of the two drops is equal to that of the single one?
    1. Radius
    2. Surface area
    3. Surface energy
    4. Volume
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  7. Question 7

    Combine three resistors 5Ω, 4.5Ω and 3Ω in such a way that the total resistance of this combination is maximum with value
    1. 12.5Ω
    2. 13.5Ω
    3. 14.5Ω
    4. 16.5Ω
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  8. Question 8

    What happens when the potassium iodide solution is added to a solution of lead nitrate?
    1. White precipitation of lead iodide is formed.
    2. Yellow precipitation of lead iodide is formed.
    3. Red precipitation of lead iodide is formed.
    4. Black precipitation of lead iodide is formed.
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  9. Question 9

    Which country has awarded Ardeshir B.K. Dubash, the ‘Order of Merit in the Diplomatic Services’?
    1. Canada
    2. France
    3. Japan
    4. Peru
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  10. Question 10

    Cause of myopia is:
    1. Contraction of eyeball.
    2. Expansion of eyeball.
    3. Dryness of eyeball.
    4. All are true
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  11. Question 11

    Which hormone is responsible for breaking the dormancy of seed?
    1. Auxin
    2. Dormin
    3. Cytokinin
    4. Gibberellin
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  12. Question 12

    Which of the following reproduction is found in plants alone?
    1. Vegetative reproduction
    2. Asexual reproduction
    3. Sexual reproduction
    4. Parthenogenesis
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  13. Question 13

    The ion of an element has three positive charge. Mass number of the atom is 27, and the number of neutrons is 14. What is the number of electrons in the ion?
    1. 13
    2. 10
    3. 14
    4. 16
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  14. Question 14

    For a floating body to be in stable equilibrium where should its centre of buoyancy be located?
    1. At the centre of gravity
    2. Above the centre of gravity
    3. Below the centre of gravity
    4. It may anywhere
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  15. Question 15

    Baking soda is mixture of:
    1. sodium carbonate and acetic acid
    2. sodium carbonate and tartaric acid
    3. sodium hydrogen carbonate and tartaric acid
    4. sodium hydrogen carbonate and acetic acid
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  16. Question 16

    A metallic ball has a spherical cavity at its centre. If the ball is heated what happens to the cavity?
    1. Its volume decreases
    2. Its volume increases
    3. Its volume remains unchanged
    4. Its volume may increase or decrease depending upon the nature of the metal.
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  17. Question 17

    One of the following terms includes rest of the lot. Identify that term:

    Glucocorticoids, Adrenaline, Mineralocorticoids, Suprarenal gland.
    1. Mineralocorticoids
    2. Adrenaline
    3. Suprarenal gland
    4. Glucocorticoids
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  18. Question 18

    A bird is sitting a wire cage hanging from the spring balance. Let the reading of the spring balance be W1 . If the bird flies about inside the cage, the reading of the spring balance becomes W2 . Which of the following is true?
    1. W1 > W2
    2. W1 < W2
    3. W1 = W2
    4. w1 = 1/ W2
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  19. Question 19

    The efficiency of a Carnot engine working between 2270 C and 270 C is :
    1. 100%
    2. 50%
    3. 40%
    4. 20%
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  20. Question 20

    In which substage of interphase is DNA doubled?
    1. G1
    2. S
    3. G2
    4. G0
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  21. Question 21

    If number of molecules present in 9g of water is n, then number of molecules present in 44g of carbon-di-oxide is:
    1. n
    2. 2n
    3. n/2
    4. 3n
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  22. Question 22

    According to Newlands law of octaves, beryllium resembles which of the following dements?
    1. Sodium
    2. Magnesium
    3. Calcium
    4. Aluminium
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  23. Question 23

    An iron ball is heated. The percentage increase will be largest in:
    1. Density
    2. Surface area
    3. Diameter
    4. Volume
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  24. Question 24

    Which of the following diseases is autosomal?
    1. Haemophilia
    2. Thalassemia
    3. Colourblindness
    4. All of the above
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  25. Question 25

    The density of water at 20° C is 998 kmg-3 and that at 40°C is 992 kmg-3. The coefficient of the cubical expansion of water is:
    1. 2*10-4° c-1
    2. 6*10-4° c-1
    3. 3.00*10-4° c-1
    4. 4*104° c-1
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  26. Question 26

    Which type of mirror is primarily used as a rear-view mirror in motor vehicles?
    1. Concave mirror
    2. Convex mirror
    3. Plane mirror
    4. Cylindrical mirror
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  27. Question 27

    If two electrical resistors of 8 ohms each are connected in parallel, what is their equivalent resistance?
    1. 16 ohms
    2. 8 ohms
    3. 4 ohms
    4. 2 ohms
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  28. Question 28

    If the velocity of a moving body is doubled, what happens to its kinetic energy?
    1. It becomes four times.
    2. It gets doubled.
    3. It becomes half.
    4. It remains the same.
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  29. Question 29

    At what specific temperature does pure water have its maximum density?
    1. 4°C
    2. 0°C
    3. 100°C
    4. -4°C
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  30. Question 30

    The pitch of a sound wave strictly depends upon which physical property?
    1. Amplitude
    2. Wavelength
    3. Frequency
    4. Speed
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  31. Question 31

    Which specific isotope of uranium is primarily used as fuel in nuclear power reactors?
    1. U-238
    2. U-234
    3. U-235
    4. U-233
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  32. Question 32

    What is the approximate escape velocity on the surface of the Earth?
    1. 11.2 km/s
    2. 9.8 km/s
    3. 7.9 km/s
    4. 15.6 km/s
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  33. Question 33

    The functioning of an optical fiber is based entirely on which physical phenomenon?
    1. Diffraction of light
    2. Dispersion of light
    3. Refraction of light
    4. Total internal reflection
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  34. Question 34

    Aqua Regia is a highly corrosive mixture composed of which two strong acids?
    1. Sulfuric acid and Hydrochloric acid
    2. Nitric acid and Sulfuric acid
    3. Hydrochloric acid and Nitric acid
    4. Phosphoric acid and Nitric acid
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  35. Question 35

    'Cinnabar' is a prominent naturally occurring ore of which metal?
    1. Mercury
    2. Lead
    3. Zinc
    4. Copper
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  36. Question 36

    Which non-metal remains in a liquid state at normal room temperature?
    1. Iodine
    2. Bromine
    3. Chlorine
    4. Fluorine
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  37. Question 37

    What is the main chemical constituent of 'Plaster of Paris'?
    1. Calcium carbonate
    2. Calcium hydroxide
    3. Sodium bicarbonate
    4. Calcium sulfate hemihydrate
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  38. Question 38

    The elements located in Group 18 of the modern periodic table are known as what?
    1. Alkali metals
    2. Halogens
    3. Noble gases
    4. Alkaline earth metals
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  39. Question 39

    What is the IUPAC name of the organic compound commonly known as 'acetic acid'?
    1. Ethanoic acid
    2. Methanoic acid
    3. Propanoic acid
    4. Butanoic acid
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  40. Question 40

    Galvanization is a method of protecting iron from rusting by coating it with which metal?
    1. Zinc
    2. Aluminum
    3. Copper
    4. Tin
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  41. Question 41

    Which gland in the human body is popularly known as the 'Master Gland'?
    1. Pituitary gland
    2. Thyroid gland
    3. Adrenal gland
    4. Pancreas
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  42. Question 42

    Which of the following cell organelles distinctly contains its own DNA?
    1. Golgi apparatus
    2. Endoplasmic reticulum
    3. Lysosome
    4. Mitochondria
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  43. Question 43

    Down syndrome in humans is caused by the presence of an extra copy of which chromosome?
    1. Chromosome 13
    2. Chromosome 18
    3. Chromosome X
    4. Chromosome 21
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  44. Question 44

    The movement of water and dissolved minerals from roots to leaves in plants is conducted by which tissue?
    1. Phloem
    2. Xylem
    3. Epidermis
    4. Cambium
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  45. Question 45

    The 'BCG' vaccine is administered to infants to provide immunity against which highly contagious disease?
    1. Polio
    2. Measles
    3. Tuberculosis
    4. Tetanus
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  46. Question 46

    Pernicious anemia is a medical condition caused by a severe deficiency of which specific vitamin?
    1. Vitamin C
    2. Vitamin D
    3. Vitamin K
    4. Vitamin B12
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  47. Question 47

    Which of the following is a completely cold-blooded (ectothermic) animal?
    1. Penguin
    2. Dolphin
    3. Crocodile
    4. Bat
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  48. Question 48

    Where are red blood cells (RBCs) primarily produced in the adult human body?
    1. Bone marrow
    2. Liver
    3. Spleen
    4. Heart
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  49. Question 49

    The international 'Montreal Protocol' signed in 1987 primarily deals with which environmental issue?
    1. Global warming and greenhouse gases
    2. Conservation of wetlands
    3. Depletion of the ozone layer
    4. Transboundary movement of hazardous waste
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  50. Question 50

    What does the 'URL' explicitly stand for ___________.
    1. Universal Routing Link
    2. Unified Recovery Line
    3. User Registered Location
    4. Uniform Resource Locator
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  51. Question 51

    Stammering is to Speech as Deafness is to
    1. Ear
    2. Hearing
    3. Noise
    4. Commotion
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  52. Question 52

    'Seahorse' is a
    1. Mammal
    2. Plant
    3. Fish
    4. None of the above
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  53. Question 53

    Which among the following is present in refrigerator?
    1. Carbon dioxide
    2. Methane
    3. Helium
    4. Chlorofluorocarbon
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  54. Question 54

    Which one of the following animals is not warm-blooded?
    1. Hen
    2. Tiger
    3. Bat
    4. Toad
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  55. Question 55

    The radiation carrying maximum energy-
    1. UV rays U
    2. Gamma rays
    3. X-rays
    4. IR rays
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  56. Question 56

    Which of the following is chiefly present in LPG?
    1. Methane
    2. Ethane
    3. Propane
    4. Butane
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  57. Question 57

    Pure water freezes at a temperature-
    1. 47 °F
    2. 32 °F
    3. 0 °F
    4. 19 °F
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  58. Question 58

    Which metal is present in haemoglobin?
    1. Iron
    2. Copper
    3. Tin
    4. Aluminium
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  59. Question 59

    Which of the following is an aquatic fern?
    1. Adiantum
    2. Drvopteris
    3. Salvinia
    4. Equisetum
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  60. Question 60

    Which part of human eye has the maximum refractive index?
    1. Aqueous humour
    2. Vitreous humour
    3. Lens
    4. Cornea
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  61. Question 61

    What is the chromosome number in human ovum?
    1. 36
    2. 46
    3. 48
    4. None of the above
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  62. Question 62

    The first transgenic crop was
    1. Tobacco
    2. Cotton
    3. Pea
    4. Rice
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  63. Question 63

    Which quantity is increased in step-down transformer?
    1. Voltage
    2. Current
    3. Wattage
    4. Frequency
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  64. Question 64

    0 is isoelectronic with
    1. F⁻
    2. Cl⁻
    3. Li⁺
    4. K⁺
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  65. Question 65

    The vitamin which helps in clotting of blood is
    1. A
    2. D
    3. B
    4. K
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  66. Question 66

    Which one of the following animals is known as a ‘living fossil’?
    1. Peripatus
    2. Amoeba
    3. Prawn
    4. Apple snail
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  67. Question 67

    A particle is moving in a uniform circular motion with constant speed V along a circle of radius r. The acceleration of the particle is
    1. Zero
    2. V/r
    3. V/r²
    4. V²/r
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  68. Question 68

    Curie is unit of
    1. Radioactivity
    2. Temperature
    3. Heat
    4. Energy
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  69. Question 69

    Bronze is an alloy of
    1. Copper and Zinc
    2. Tia and Zinc
    3. Copper and Tin
    4. Iron and Zinc
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  70. Question 70

    Which of the following isotopes is used in dating archaeological findings?
    1. (_92^235)U
    2. (_6^14)C
    3. (_1^3)H
    4. (_8^18)O
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  71. Question 71

    ELISA test is employed to diagnose
    1. POLIO VIRUS
    2. AIDS antibodies
    3. Tuberculosis
    4. Cancer
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  72. Question 72

    The radioactive element used in Heart-pacemakers is
    1. Uranium
    2. Deuterium
    3. Plutonium
    4. Radium
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  73. Question 73

    Phytopthora palmivora is a
    1. bio-pesticide
    2. bio-insecticide
    3. mycoherbicide
    4. first bio-herbicide
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  74. Question 74

    Fermentation ability of Yeast is due to
    1. Amylase
    2. Zymase
    3. Invertase
    4. Galactase
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  75. Question 75

    The 'powerhouse' of cell is
    1. Nucleus
    2. Lysosome
    3. Mitochondria
    4. DNA
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  76. Question 76

    1 nanometer (nm) is equivalent to -
    1. 100 Å
    2. 10 Å
    3. 1000 Å
    4. 0.1 Å
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  77. Question 77

    When a heavy body is lifted manually by a human hand, the forearm acts as which type of simple machine?
    1. First-class lever
    2. Second-class lever
    3. Third-class lever
    4. Fixed pulley
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  78. Question 78

    A particle is moving in uniform circular motion with a constant speed V along a circle of radius r. What is the precise magnitude of the acceleration of this particle?
    1. Zero
    2. V/r
    3. V2/r
    4. Vr2
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  79. Question 79

    If a highly accurate pendulum clock is physically transported from the Earth's equator to the North Pole, how will its timekeeping be affected?
    1. It will run slow.
    2. It will stop completely.
    3. It will keep the exact same time.
    4. It will run fast.
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  80. Question 80

    A body is floating in a liquid, partly immersed. If the entire apparatus (body and liquid) is taken to the Moon, what will happen to the immersed fraction of the body?
    1. It floats with a greater part immersed.
    2. It floats with a lesser part immersed.
    3. It completely sinks.
    4. It floats with the exact same part immersed.
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  81. Question 81

    75% of a given radioactive element completely decays in exactly 6 hours. What is its precise half-life period?
    1. 1.5 Hours
    2. 2 Hours
    3. 3 Hours
    4. 4.5 Hours
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  82. Question 82

    Consider the following statements regarding the Photoelectric Effect:

    1. The stopping potential depends directly on the frequency of the incident light.
    2. The saturation photoelectric current depends directly on the intensity of the incident light.

    Which of the statements given above is/are correct?
    1. Only 1
    2. Only 2
    3. Both 1 and 2
    4. Neither 1 nor 2
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  83. Question 83

    On an average, the Earth's lower atmosphere contains approximately what percentage of water vapor by volume?
    1. 1%
    2. 5%
    3. 10%
    4. 21%
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  84. Question 84

    Which of the following chemical substances can act strictly ONLY as a reducing agent in a chemical reaction?
    1. H2O2
    2. SO2
    3. H2S
    4. HNO3
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  85. Question 85

    The magnesium ion (Mg2+>) is strictly isoelectronic with which of the following chemical species?
    1. Ca2+
    2. Na+
    3. Cl-
    4. K+
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  86. Question 86

    How many grams of a dibasic acid (molecular weight = 200) should be present in 100 ml of its aqueous solution to give exactly 0.1 (N) strength?
    1. 1 gm
    2. 2 gm
    3. 0.5 gm
    4. 10 gm
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  87. Question 87

    The chopping of an onion heavily brings tears to the eyes because it aggressively releases a highly volatile chemical containing which element?
    1. Phosphorus
    2. Nitrogen
    3. Sulphur
    4. Chlorine
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  88. Question 88

    Which highly specific radioactive element isotope is used as a long-lasting power source in heart pacemakers?
    1. Uranium-235
    2. Plutonium-238
    3. Radium-226
    4. Cobalt-60
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  89. Question 89

    Consider the following statements regarding fullerenes (such as Buckminsterfullerene C60):

    1. A C60 molecule contains exactly 20 six-membered carbon rings and 12 five-membered carbon rings.
    2. All the carbon atoms in a fullerene molecule are strictly sp2 hybridized.

    Which of the statements given above is/are correct?
    1. Only 1
    2. Only 2
    3. Both 1 and 2
    4. Neither 1 nor 2
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  90. Question 90

    Which of the following alkali metal ions exhibits the absolute highest hydration enthalpy in an aqueous solution?
    1. Li+
    2. K+
    3. Rb+
    4. Na+
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  91. Question 91

    A healthy plant cell visibly shrinks and pulls away from its cell wall (plasmolysis) when it is placed directly into which type of solution?
    1. Isotonic solution
    2. Hypotonic solution
    3. Amphoteric solution
    4. Hypertonic solution
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  92. Question 92

    In entomology, a 'grub' is biologically classified as the active, feeding larval stage of which specific insect?
    1. Butterfly
    2. Beetle
    3. Housefly
    4. Mosquito
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  93. Question 93

    How do biological enzymes successfully speed up complex biochemical reactions within the human body?
    1. By heavily increasing the temperature of the reaction.
    2. By completely altering the end products of the reaction.
    3. By forcefully increasing the kinetic energy of the substrate.
    4. By lowering the activation energy of the reaction.
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  94. Question 94

    Deficiency of Vitamin B12 cause of _____________.
    1. Scurvy
    2. Pernicious Anaemia
    3. Beriberi
    4. Pellagra
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  95. Question 95

    In virology, what does the specific scientific term 'virion' accurately refer to?
    1. A virus that has successfully integrated into host DNA.
    2. An incomplete, non-infectious viral fragment.
    3. A completely assembled, infective viral particle outside a host cell.
    4. A specialized protein strictly produced by the host to fight viruses.
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  96. Question 96

    Under normal physiological conditions at rest, what is the exact maximum amount of oxygen (O2) carried by 100 ml of pure, oxygenated human blood?
    1. 5 ml
    2. 10 ml
    3. 20 ml
    4. 30 ml
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  97. Question 97

    Consider the following statements regarding human respiration:

    1. The 'Bohr effect' describes how high concentrations of CO2 and low pH heavily decrease the blood's affinity for oxygen.

    2. The vast majority of carbon dioxide is transported in human blood simply as a dissolved gas in the blood plasma.

    Which of the statements given above is/are correct?
    1. Only 1
    2. Only 2
    3. Both 1 and 2
    4. Neither 1 nor 2
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  98. Question 98

    In human genetics, the incredibly rare 'Bombay blood group' phenotype is clinically characterized by the absolute absence of which specific antigen?
    1. A antigen
    2. B antigen
    3. D antigen
    4. H antigen
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  99. Question 99

    Which of the following highly toxic environmental compounds is strictly classified as a secondary air pollutant?
    1. Carbon monoxide (CO)
    2. Sulfur dioxide (SO2)
    3. Peroxyacetyl nitrate (PAN)
    4. Nitrogen oxide (NO)
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  100. Question 100

    Which programming languages is the most heavily and commonly used for developing native Android applications?
    1. Java
    2. Swift
    3. Ruby
    4. Objective-C
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  101. Question 101

    What is the standard SI unit of force?
    1. Joule
    2. Newton
    3. Watt
    4. Pascal
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  102. Question 102

    Which instrument is used to measure electric current in a circuit?
    1. Voltmeter
    2. Barometer
    3. Ammeter
    4. Galvanometer
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  103. Question 103

    A 'Light Year' is used as a unit of measurement for which of the following?
    1. Time
    2. Speed of light
    3. Distance
    4. Intensity of light
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  104. Question 104

    Which device converts mechanical energy into electrical energy?
    1. Generator
    2. Electric Motor
    3. Transformer
    4. Battery
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  105. Question 105

    Which of the following are the primary colors of light?
    1. Red, Yellow, Blue
    2. Cyan, Magenta, Yellow
    3. Green, Yellow, Orange
    4. Red, Blue, Green
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  106. Question 106

    Sound waves cannot travel through which of the following mediums?
    1. Solid iron
    2. Liquid water
    3. Vacuum
    4. Compressed air
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  107. Question 107

    What is the approximate value of acceleration due to gravity (g) on the surface of the Earth?
    1. 8.8 m/s²
    2. 9.8 m/s²
    3. 10.8 m/s²
    4. 11.2 m/s²
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  108. Question 108

    Newton's First Law of Motion is also commonly known as what?
    1. Law of Momentum
    2. Law of Conservation of Energy
    3. Law of Action and Reaction
    4. Law of Inertia
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  109. Question 109

    What is the common chemical name for ordinary table salt?
    1. Sodium Carbonate
    2. Sodium Chloride
    3. Potassium Chloride
    4. Calcium Carbonate
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  110. Question 110

    Which is the lightest gas in the periodic table?
    1. Oxygen
    2. Helium
    3. Hydrogen
    4. Nitrogen
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  111. Question 111

    What is the pH value of pure, neutral water at room temperature?
    1. 5
    2. 7
    3. 9
    4. 14
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  112. Question 112

    Which central part of an atom contains protons and neutrons?
    1. Nucleus
    2. Electron cloud
    3. Orbit
    4. Molecule
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  113. Question 113

    Which of the following metals is found in a liquid state at room temperature?
    1. Mercury
    2. Silver
    3. Aluminum
    4. Copper
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  114. Question 114

    What is the chemical formula for baking soda?
    1. Na2CO3
    2. NaCl
    3. NaOH
    4. NaHCO3
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  115. Question 115

    Which gas is most abundant in the Earth's atmosphere?
    1. Oxygen
    2. Carbon Dioxide
    3. Nitrogen
    4. Argon
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  116. Question 116

    Which cell organelle is famously known as the "powerhouse of the cell"?
    1. Ribosome
    2. Nucleus
    3. Mitochondria
    4. Golgi apparatus
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  117. Question 117

    What is the green pigment present in plant leaves that helps in photosynthesis?
    1. Melanin
    2. Chlorophyll
    3. Carotene
    4. Hemoglobin
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  118. Question 118

    Which is the longest and strongest bone in the human body?
    1. Tibia
    2. Femur
    3. Humerus
    4. Radius
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  119. Question 119

    Which vitamin is naturally produced in the human body when exposed to morning sunlight?
    1. Vitamin D
    2. Vitamin A
    3. Vitamin B12
    4. Vitamin C
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  120. Question 120

    Which human organ is primarily responsible for pumping blood throughout the body?
    1. Lungs
    2. Liver
    3. Heart
    4. Kidneys
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  121. Question 121

    The deficiency of iodine in the human diet primarily causes which disease?
    1. Scurvy
    2. Rickets
    3. Goiter
    4. Anemia
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  122. Question 122

    What is the basic structural and functional unit of all living organisms?
    1. Cell
    2. Tissue
    3. Organ
    4. System
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  123. Question 123

    Which blood cells are responsible for fighting infections and diseases in the human body?
    1. Red Blood Cells
    2. White Blood Cells
    3. Platelets
    4. Plasma
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  124. Question 124

    The ozone layer in the Earth's atmosphere primarily protects us from which harmful rays?
    1. Infrared rays
    2. X-rays
    3. Gamma rays
    4. Ultraviolet (UV) rays
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  125. Question 125

    Which component is universally considered the "brain" of a computer system?
    1. Hard Drive
    2. RAM
    3. Motherboard
    4. CPU
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  126. Question 126

    The dimensions of Planck's constant are identical to which of the following physical quantities?
    1. Linear momentum
    2. Angular momentum
    3. Energy
    4. Force
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  127. Question 127

    According to Stokes' Law, the terminal velocity of a small spherical body falling through a viscous fluid is directly proportional to what?
    1. Its radius
    2. The square of its radius
    3. Its mass
    4. The square root of its radius
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  128. Question 128

    In the photoelectric effect, the stopping potential fundamentally depends on which characteristic of the incident light?
    1. Intensity
    2. Speed
    3. Amplitude
    4. Frequency
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  129. Question 129

    A perfect superconductor exhibits extreme diamagnetism, completely expelling internal magnetic fields. What is this phenomenon called?
    1. Meissner effect
    2. Zeeman effect
    3. Peltier effect
    4. Seebeck effect
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  130. Question 130

    Which thermodynamic process occurs without any transfer of heat between the system and its surroundings?
    1. Isobaric process
    2. Isochoric process
    3. Adiabatic process
    4. Isothermal process
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  131. Question 131

    What is the SI unit of magnetic flux?
    1. Tesla
    2. Weber
    3. Henry
    4. Gauss
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  132. Question 132

    Kepler's Second Law of Planetary Motion (the Law of Areas) is a direct consequence of the conservation of which quantity?
    1. Kinetic energy
    2. Linear momentum
    3. Total mechanical energy
    4. Angular momentum
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  133. Question 133

    What is the exact compressibility factor (Z) for an ideal gas under all conditions of temperature and pressure?
    1. 0
    2. 1
    3. Infinity
    4. Less than 1
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  134. Question 134

    What is the oxidation state of iron (Fe) in Potassium ferricyanide

    F3[Fe(CN)6]?
    1. +2
    2. +3
    3. +4
    4. +6
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  135. Question 135

    The complete inversion of stereochemical configuration during an SN2 reaction is famously known as what?
    1. Walden inversion
    2. Racemization
    3. Markovnikov addition
    4. Zaitsev elimination
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  136. Question 136

    How many total constituent atoms effectively belong to a Face-Centered Cubic (FCC) unit cell?
    1. 1
    2. 2
    3. 4
    4. 6
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  137. Question 137

    The potential of the Standard Hydrogen Electrode (SHE) is arbitrarily assigned which exact value at all temperatures?
    1. 1.00 V
    2. 0.00 V
    3. -1.00 V
    4. 2.40 V
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  138. Question 138

    Kevlar, a synthetic fiber known for its exceptionally high tensile strength, belongs to which class of polymers?
    1. Polyamides
    2. Polyolefins
    3. Polyesters
    4. Polycarbonates
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  139. Question 139

    What is the conjugate base of Sulfuric acid (H2SO4) ?
    1. Sulfate ion SO2-
    2. Sulfite ion SO32-
    3. Hydrogen sulfate ion HSO4-
    4. Hydronium ion H3O+
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  140. Question 140

    The Ziegler-Natta catalyst, heavily used for the industrial polymerization of alkenes, contains which transition metal?
    1. Titanium
    2. Iron
    3. Palladium
    4. Platinum
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  141. Question 141

    Which highly specialized enzyme acts like molecular glue to join Okazaki fragments together during DNA replication?
    1. DNA polymerase
    2. DNA helicase
    3. DNA ligase
    4. RNA primase
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  142. Question 142

    The crossing over of genetic material between non-sister chromatids strictly occurs during which sub-stage of Prophase I in meiosis?
    1. Leptotene
    2. Zygotene
    3. Pachytene
    4. Diplotene
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  143. Question 143

    Which specific hormone is primarily responsible for the rapid ejection of milk from the mammary glands after childbirth?
    1. Prolactin
    2. Oxytocin
    3. Estrogen
    4. Progesterone
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  144. Question 144

    Which antibody isotype is the most abundant in human colostrum (early breast milk), providing crucial passive immunity to infants?
    1. IgG
    2. IgM
    3. IgE
    4. IgA
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  145. Question 145

    The first stable compound formed in the C4 pathway of photosynthesis is what?
    1. Phosphoglyceric acid (PGA)
    2. Ribulose bisphosphate (RuBP)
    3. Oxaloacetic acid (OAA)
    4. Malic acid
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  146. Question 146

    The highly specialized 'Kupffer cells', which act as powerful phagocytes, are exclusively found in which human organ?
    1. Spleen
    2. Brain
    3. Liver
    4. Kidneys
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  147. Question 147

    Renin, an enzyme that heavily regulates human blood pressure, is directly secreted by which specific cells?
    1. Juxtaglomerular cells of the kidney
    2. Chief cells of the stomach
    3. Alpha cells of the pancreas
    4. Sertoli cells of the testes
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  148. Question 148

    The 'Nodes of Ranvier' are vital microscopic gaps specifically found in what biological structure?
    1. Cardiac muscle fibers
    2. Haversian canals in bones
    3. The intestinal villi
    4. The myelin sheath of axons
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  149. Question 149

    The international 'Cartagena Protocol' is a highly critical environmental agreement governing the transboundary movement of what?
    1. Hazardous chemical waste
    2. Ozone-depleting substances
    3. Endangered wildlife species
    4. Living Modified Organisms
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  150. Question 150

    In the OSI model of computer networking, which specific layer is primarily responsible for logical IP addressing and routing?
    1. Data Link Layer
    2. Transport Layer
    3. Network Layer
    4. Application Layer
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  151. Question 151

    Which type of lens is commonly used in spectacles to correct short-sightedness (Myopia)?
    1. Concave lens
    2. Convex lens
    3. Bifocal lens
    4. Cylindrical lens
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  152. Question 152

    The principle of rocket propulsion is strictly based on the conservation of which physical quantity?
    1. Angular momentum
    2. Mass
    3. Kinetic energy
    4. Linear momentum
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  153. Question 153

    What is the value of 'Absolute Zero' on the standard Celsius temperature scale?
    1. -100°C
    2. -273.15°C
    3. 0°C
    4. -373.15°C
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  154. Question 154

    Which electrical device is specifically used to step up or step down alternating current (AC) voltage?
    1. Rectifier
    2. Galvanometer
    3. Inverter
    4. Transformer
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  155. Question 155

    The continuous rise of oil in the wick of an earthen lamp is primarily due to which physical phenomenon?
    1. Surface tension
    2. Viscosity
    3. Capillary action
    4. Atmospheric pressure
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  156. Question 156

    Alpha particles emitted from radioactive substances are essentially equivalent to the nucleus of which element?
    1. Hydrogen
    2. Helium
    3. Lithium
    4. Beryllium
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  157. Question 157

    Modern RADAR systems predominantly use which type of electromagnetic waves to detect aircraft and ships?
    1. X-rays
    2. Infrared waves
    3. Radio waves
    4. Ultraviolet rays
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  158. Question 158

    What is the approximate pH value of normal, healthy human blood?
    1. 6.0
    2. 6.8
    3. 7.0
    4. 7.4
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  159. Question 159

    What is the primary chemical component of natural gas and biogas?
    1. Butane
    2. Methane
    3. Propane
    4. Ethane
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  160. Question 160

    Bronze is a popular metallic alloy primarily composed of which two elements?
    1. Copper and Zinc
    2. Copper and Tin
    3. Iron and Carbon
    4. Lead and Tin
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  161. Question 161

    Atoms of the same element that have the same atomic number but different mass numbers are called what?
    1. Isotopes
    2. Isobars
    3. Isomers
    4. Isotones
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  162. Question 162

    Diamond, graphite, and fullerenes are famous solid allotropes of which chemical element?
    1. Silicon
    2. Phosphorus
    3. Sulfur
    4. Carbon
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  163. Question 163

    Which of the following chemical gases is popularly known as "Laughing Gas"?
    1. Nitrous Oxide
    2. Nitrogen Dioxide
    3. Nitric Oxide
    4. Ammonia
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  164. Question 164

    Which specific radioactive isotope is universally used for determining the age of ancient organic fossils?
    1. Uranium-235
    2. Carbon-14
    3. Cobalt-60
    4. Iodine-131
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  165. Question 165

    Which is the most electronegative element in the modern periodic table?
    1. Oxygen
    2. Chlorine
    3. Fluorine
    4. Nitrogen
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  166. Question 166

    Bile juice, which heavily assists in the digestion of dietary fats, is continuously produced by which organ?
    1. Stomach
    2. Liver
    3. Pancreas
    4. Gallbladder
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  167. Question 167

    Dengue fever is a severe tropical disease transmitted by which specific mosquito species?
    1. Aedes aegypti
    2. Anopheles stephensi
    3. Culex pipiens
    4. Mansonia
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  168. Question 168

    Who is universally recognized and honored as the 'Father of Modern Genetics'?
    1. Charles Darwin
    2. Louis Pasteur
    3. James Watson
    4. Gregor Mendel
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  169. Question 169

    The vital hormone 'Insulin', which strictly regulates blood sugar levels, is secreted by which organ?
    1. Liver
    2. Thyroid
    3. Pancreas
    4. Adrenal gland
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  170. Question 170

    Unlike animal cells, plant cells have a rigid outer cell wall primarily composed of what?
    1. Chitin
    2. Peptidoglycan
    3. Glycogen
    4. Cellulose
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  171. Question 171

    Which human blood group is universally known as the "Universal Donor" in medical emergencies?
    1. O Negative
    2. O Positive
    3. A Negative
    4. AB Positive
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  172. Question 172

    The painful accumulation of which acid in human muscles causes severe fatigue during heavy physical exercise?
    1. Uric acid
    2. Lactic acid
    3. Acetic acid
    4. Citric acid
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  173. Question 173

    What is the basic structural and functional filtering unit of the human kidney?
    1. Neuron
    2. Alveolus
    3. Nephron
    4. Villi
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  174. Question 174

    The devastating 'Minamata disease' in Japan was directly caused by severe industrial pollution of which heavy metal?
    1. Mercury
    2. Arsenic
    3. Cadmium
    4. Lead
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  175. Question 175

    In computer data storage, one standard 'Byte' is exactly equal to how many bits?
    1. 4 bits
    2. 8 bits
    3. 16 bits
    4. 1024 bits
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  176. Question 176

    The working of a hydraulic press is based on which of the following laws?
    1. Archimedes' Principle
    2. Pascal's Law
    3. Bernoulli's Principle
    4. Boyle's Law
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  177. Question 177

    Which type of mirror is most suitable for use as a shaving mirror to see a magnified image?
    1. Plane mirror
    2. Convex mirror
    3. Concave mirror
    4. Parabolic mirror
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  178. Question 178

    What is the standard SI unit used to measure electrical Conductance?
    1. Ohm
    2. Siemens
    3. Ampere
    4. Tesla
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  179. Question 179

    Which of the following formulas is used to calculate the Gravitational Potential Energy of an object?
    1. 1/2 mv²
    2. 1/2 mv²
    3. P × V
    4. m × g × h
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  180. Question 180

    Which of the following types of radioactive radiation has the highest penetrating power?
    1. Alpha rays
    2. Beta rays
    3. Gamma rays
    4. Cathode rays
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  181. Question 181

    What is the minimum distance required between a source of sound and a reflecting surface to hear a distinct echo?
    1. 17.2 meters
    2. 10.2 meters
    3. 34.4 meters
    4. 5.1 meters
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  182. Question 182

    If the length of a simple pendulum is increased by four times, what will happen to its time period?
    1. It becomes four times.
    2. It remains the same.
    3. It is reduced to half.
    4. It is doubled.
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  183. Question 183

    Why does a block of ice float on the surface of liquid water?
    1. Density of ice is more than water
    2. Density of ice is less than water
    3. Ice absorbs heat from water
    4. Surface tension of water supports it
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  184. Question 184

    The 'Modern Periodic Law' states that the properties of elements are a periodic function of their?
    1. Atomic weight
    2. Atomic number
    3. Atomic volume
    4. Mass number
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  185. Question 185

    What happens to the weight of a piece of iron after it undergoes the process of rusting?
    1. It decreases
    2. It remains the same
    3. It increases
    4. It first increases then decreases
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  186. Question 186

    What is the chemical name of the medicine popularly known as 'Milk of Magnesia'?
    1. Magnesium Carbonate
    2. Magnesium Hydroxide
    3. Magnesium Chloride
    4. Magnesium Oxide
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  187. Question 187

    Which of the following metals is considered the best conductor of electricity?
    1. Copper
    2. Aluminum
    3. Silver
    4. Iron
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  188. Question 188

    According to Charles's Law, the volume of a given mass of gas is directly proportional to its?
    1. Pressure
    2. Density
    3. Absolute Temperature
    4. Celsius Temperature
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  189. Question 189

    What is the primary chemical component found in Compressed Natural Gas (CNG)?
    1. Methane
    2. Propane
    3. Butane
    4. Ethane
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  190. Question 190

    The 'Temporary Hardness' of water is primarily caused by the presence of which minerals?
    1. Chlorides of Calcium and Magnesium
    2. Sulfates of Calcium and Magnesium
    3. Bicarbonates of Calcium and Magnesium
    4. Nitrates of Sodium and Potassium
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  191. Question 191

    What is the approximate percentage of Nitrogen found in the common fertilizer Urea?
    1. 26%
    2. 33%
    3. 46%
    4. 60%
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  192. Question 192

    If a man is suffering from color blindness, which two colors will he most likely struggle to distinguish?
    1. Blue and Yellow
    2. Black and White
    3. Violet and Indigo
    4. Red and Green
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  193. Question 193

    Which vascular tissue in plants is responsible for the transport of food from the leaves to other parts of the plant?
    1. Xylem
    2. Phloem
    3. Epidermis
    4. Cortex
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  194. Question 194

    Chemically, almost all biological enzymes are composed of which type of macromolecule?
    1. Carbohydrates
    2. Lipids
    3. Proteins
    4. Nucleic acids
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  195. Question 195

    Which of the following is the smallest and lightest bone in the entire human body?
    1. Phalanges
    2. Nasal bone
    3. Lacrimal bone
    4. Stapes
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  196. Question 196

    During the process of fermentation in yeast, what are the primary end products?
    1. Ethanol and Carbon dioxide
    2. Lactic acid and Water
    3. Glucose and Oxygen
    4. Acetic acid and Nitrogen
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  197. Question 197

    A severe deficiency of Vitamin A in the human diet primarily leads to which medical condition?
    1. Beriberi
    2. Scurvy
    3. Night blindness
    4. Rickets
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  198. Question 198

    What is the main nitrogenous excretory product of most birds and reptiles?
    1. Ammonia
    2. Urea
    3. Uric acid
    4. Creatinine
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  199. Question 199

    From which type of organism was the first antibiotic, Penicillin, originally extracted?
    1. Fungus
    2. Bacteria
    3. Virus
    4. Algae
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  200. Question 200

    In computer logic, which of the following gates are popularly known as 'Universal Gates'?
    1. AND and OR
    2. NOT and XOR
    3. NAND and NOR
    4. XNOR and AND
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  201. Question 201

    Which of the following units is used to measure extremely short distances like the diameter of an atomic nucleus?
    1. Light year
    2. Astronomical unit
    3. Fermi
    4. Parsec
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  202. Question 202

    Which physical phenomenon is responsible for the splitting of white light into seven colors when it passes through a glass prism?
    1. Reflection
    2. Dispersion
    3. Total internal reflection
    4. Interference
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  203. Question 203

    What is the frequency range of ultrasonic waves, which are used in sonar and medical imaging?
    1. Above 20,000 Hz
    2. Below 20 Hz
    3. Between 20 Hz and 20,000 Hz
    4. Exactly 10,000 Hz
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  204. Question 204

    If the displacement of an object is perpendicular to the direction of the force applied, what is the work done?
    1. Maximum
    2. Minimum but positive
    3. Negative
    4. Zero
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  205. Question 205

    Which mode of heat transfer is primarily responsible for the heating of water in a beaker placed on a burner?
    1. Conduction
    2. Radiation
    3. Convection
    4. Insulation
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  206. Question 206

    How does the value of the Universal Gravitational Constant (G) change if an object is moved from the Earth to the Moon?
    1. It increases.
    2. It remains constant.
    3. It decreases.
    4. It becomes zero.
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  207. Question 207

    Which type of lens is used in spectacles to correct the vision defect known as Hypermetropia (Farsightedness)?
    1. Convex lens
    2. Concave lens
    3. Bifocal lens
    4. Cylindrical lens
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  208. Question 208

    How is a Voltmeter typically connected in an electrical circuit to measure the potential difference across a resistor?
    1. In series
    2. In a bridge circuit
    3. Randomly
    4. In parallel
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  209. Question 209

    What is the chemical name for Bleaching Powder, commonly used for disinfecting drinking water?
    1. Calcium Carbonate
    2. Sodium Hypochlorite
    3. Calcium Oxychloride
    4. Calcium Hydroxide
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  210. Question 210

    Which chemical process involves the direct conversion of a solid substance into a gas without passing through the liquid state?
    1. Evaporation
    2. Sublimation
    3. Condensation
    4. Distillation
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  211. Question 211

    Which of the following metals is recognized as the most malleable, allowing it to be beaten into extremely thin foils?
    1. Silver
    2. Aluminum
    3. Gold
    4. Platinum
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  212. Question 212

    Which acid is naturally secreted in the human stomach to assist in the digestion of food?
    1. Sulfuric acid
    2. Hydrochloric acid
    3. Nitric acid
    4. Citric acid
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  213. Question 213

    'Heavy Water', used as a moderator in nuclear reactors, is chemically known as what?
    1. Tritium Oxide
    2. Hydrogen Peroxide
    3. Deuterium Oxide
    4. Distilled Water
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  214. Question 214

    Which element is added to natural rubber during the process of vulcanization to increase its strength and elasticity?
    1. Carbon
    2. Phosphorus
    3. Sulfur
    4. Silicon
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  215. Question 215

    Solder, an alloy used extensively in the electronics industry for joining wires, is composed of which two metals?
    1. Copper and Zinc
    2. Aluminum and Copper
    3. Lead and Tin
    4. Lead and Silver
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  216. Question 216

    What is the main chemical component found in Liquefied Petroleum Gas (LPG) used in households?
    1. Methane
    2. Butane
    3. Ethane
    4. Acetylene
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  217. Question 217

    Which cell organelle is primarily responsible for the synthesis of proteins within a cell?
    1. Ribosomes
    2. Mitochondria
    3. Golgi body
    4. Lysosomes
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  218. Question 218

    Which of the following is considered the largest internal organ of the human body?
    1. Skin
    2. Brain
    3. Liver
    4. Small Intestine
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  219. Question 219

    Which hormone is famously known as the 'Fight or Flight' hormone, released during stressful situations?
    1. Insulin
    2. Thyroxine
    3. Adrenaline
    4. Estrogen
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  220. Question 220

    What is the primary function of stomata, found on the surface of plant leaves?
    1. Absorption of water
    2. Protection from pests
    3. Gaseous exchange
    4. Support of the stem
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  221. Question 221

    The deficiency of which vitamin leads to a disease called Scurvy, characterized by bleeding gums?
    1. Vitamin A
    2. Vitamin B1
    3. Vitamin C
    4. Vitamin K
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  222. Question 222

    How many total chromosomes are present in a normal, healthy human somatic cell?
    1. 23
    2. 44
    3. 48
    4. 46
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  223. Question 223

    Which type of pathogen is responsible for causing the disease Polio?
    1. Bacteria
    2. Virus
    3. Protozoa
    4. Fungus
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  224. Question 224

    Which blood group is known as the 'Universal Recipient' because it can safely receive blood from any donor?
    1. AB positive
    2. A positive
    3. O negative
    4. B negative
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  225. Question 225

    In computer terminology, exactly how many Bytes are contained in one Kilobyte (KB)?
    1. 1000 Bytes
    2. 1024 Bytes
    3. 512 Bytes
    4. 2048 Bytes
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  226. Question 226

    What is the standard SI unit used to measure the power of a lens?
    1. Candela
    2. Lumen
    3. Dioptre
    4. Watt
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  227. Question 227

    Which physical phenomenon is responsible for the twinkling of stars observed from Earth?
    1. Atmospheric refraction
    2. Total internal reflection
    3. Dispersion of light
    4. Internal scattering
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  228. Question 228

    A transformer works on the principle of which of the following?
    1. Self-induction
    2. Mutual induction
    3. Static electricity
    4. Magnetic resonance
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  229. Question 229

    What happens to the weight of an object when it is taken to the center of the Earth?
    1. It remains constant.
    2. It becomes infinite.
    3. It becomes zero.
    4. It doubles in value.
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  230. Question 230

    Which type of electromagnetic radiation has the longest wavelength in the spectrum?
    1. Infrared rays
    2. Gamma rays
    3. Ultraviolet rays
    4. Radio waves
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  231. Question 231

    What is the primary reason why a needle floats on the surface of clean water?
    1. Viscosity of water
    2. Buoyant force
    3. Surface tension
    4. Low density of steel
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  232. Question 232

    Which mirror is traditionally used by dentists to see enlarged images of teeth?
    1. Convex mirror
    2. Concave mirror
    3. Plane mirror
    4. Bifocal mirror
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  233. Question 233

    The speed of sound is generally highest in which of the following mediums?
    1. Gases
    2. Liquids
    3. Solids
    4. Vacuum
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  234. Question 234

    What physical quantity is measured using a Spherometer?
    1. Density of liquids
    2. Atmospheric pressure
    3. Curvature of surfaces
    4. Speed of wind
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  235. Question 235

    Which alloy is primarily used to make a fuse wire in electrical circuits?
    1. Brass and Copper
    2. Lead and Tin
    3. Aluminum and Nickel
    4. Iron and Chromium
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  236. Question 236

    What is the main chemical component found in ordinary Vinegar?
    1. Formic acid
    2. Citric acid
    3. Acetic acid
    4. Tartaric acid
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  237. Question 237

    Which gas is most commonly used to fill incandescent electric light bulbs?
    1. Oxygen
    2. Hydrogen
    3. Hydrogen
    4. Carbon dioxide
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  238. Question 238

    What is the common name for the chemical compound Sodium Bicarbonate?
    1. Washing soda
    2. Bleaching powder
    3. Baking soda
    4. Caustic soda
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  239. Question 239

    Which element is always present in all organic compounds?
    1. Nitrogen
    2. Oxygen
    3. Carbon
    4. Phosphorus
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  240. Question 240

    What is the main component found in Liquefied Petroleum Gas (LPG) cylinders?
    1. Methane
    2. Butane
    3. Ethane
    4. Acetylene
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  241. Question 241

    Which of the following is considered the purest natural form of carbon?
    1. Coal
    2. Graphite
    3. Diamond
    4. Lamp black
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  242. Question 242

    Which vitamin is essential for the normal clotting of blood in the human body?
    1. Vitamin A
    2. Vitamin C
    3. Vitamin D
    4. Vitamin K
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  243. Question 243

    Which blood group is universally recognized as the 'Universal Recipient'?
    1. AB positive
    2. O positive
    3. O negative
    4. A negative
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  244. Question 244

    Which human gland is popularly known as the 'Master Gland' of the endocrine system?
    1. Thyroid gland
    2. Adrenal gland
    3. Pituitary gland
    4. Pancreas
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  245. Question 245

    Who proposed the 'Double Helix' model of DNA structure in 1953?
    1. Watson and Crick
    2. Robert Hooke
    3. Charles Darwin
    4. Gregor Mendel
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  246. Question 246

    Which specific enzyme is responsible for the digestion of starch in the human mouth?
    1. Pepsin
    2. Lipase
    3. Salivary amylase
    4. Trypsin
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  247. Question 247

    What is the approximate average lifespan of a Red Blood Cell (RBC) in humans?
    1. 60 days
    2. 120 days
    3. 180 days
    4. 240 days
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  248. Question 248

    Which cell organelle is commonly referred to as the 'Suicide Bag' of the cell?
    1. Ribosome
    2. Mitochondria
    3. Lysosome
    4. Centrosome
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  249. Question 249

    In computer science, which of the following is a 'volatile' form of memory?
    1. ROM
    2. Hard Disk
    3. RAM
    4. Flash Drive
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  250. Question 250

    What does the acronym 'HTTP' stand for in the context of the World Wide Web?
    1. High Text Transfer Protocol
    2. High Transfer Text Protocol
    3. Hypertext Total Program
    4. Hypertext Transfer Protocol
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