Practice test

Metals, non metals and metallurgy - Test Set 4

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    Teeth and bones acquire strength and rigidity from
    1. Fluorine
    2. Chlorine
    3. Sodium
    4. Calcium
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  2. Question 2

    Consider the following statements:
    I. Marble is a constituent of toothpaste.
    II. Gypsum is used for the manufacture of ammonium sulphate.
    Which of the statement(s) given above is/are correct?
    1. Only I
    2. Only II
    3. Both I and II
    4. Neither I nor II
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  3. Question 3

    Which of the following is used in welding broken pieces of iron rails and machine parts?
    1. Aluminium sulphate
    2. Solder
    3. Aluminium powder
    4. None of the above
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  4. Question 4

    The metal used for making aircrafts and rockets is
    1. Lead
    2. Aluminium
    3. Nickel
    4. Copper
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  5. Question 5

    Why are stainless steel cooking pans fabricated with copper bottom?
    1. Copper is cheaper
    2. Conductivities of copper is more than the stainless steel
    3. Copper increases durability of the cooking pan
    4. Copper is a good reflector of heat
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  6. Question 6

    SSC CGL 2019
    Rust needs three components to occur, i.e. ________.
    1. Steel, iron and oxygen
    2. Iron, oxygen and moisture
    3. Iron, nitrogen and moisture
    4. Helium, hydrogen and nitrogen
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  7. Question 7

    Which one of the following is the number of water molecules that share with two formula unit in plaster of Paris?
    1. One
    2. Two
    3. Five
    4. Ten
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  8. Question 8

    Steel is more elastic than rubber because it
    1. Is deformed very easily
    2. Is harder than rubber
    3. Required larger deforming force
    4. Is never deformed
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  9. Question 9

    Which of the following metal is most ductile in nature?
    1. Copper
    2. Silver
    3. Gold
    4. Aluminum
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  10. Question 10

    Iron nails are dipped into blue copper sulphate solution. After sometime iron nails are
    1. Dissolved and blue colour is discharged
    2. Dissolved but blue colour is not discharged
    3. Not dissolved and blue colour is not discharged
    4. Not dissolved but blue colour is discharged
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  11. Question 11

    Which is the purest commercial form of iron?
    1. Pig iron
    2. Pig iron
    3. Stainless steel
    4. Wrought iron
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  12. Question 12

    Which one of the following contains maximum percentage of carbon?
    1. Cast iron
    2. Stainless steel
    3. Wrought iron
    4. High speed steel
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  13. Question 13

    Statement I: The blue colour of copper sulphate crystal disappears when it is heated strongly.
    Statement II: Due to heating, water of crystallisation of crystal is lost.
    1. Both the Statements I and II are individually true and Statement II is the correct explanation of Statement I.
    2. Both the Statements are individually true but Statement II is not the correct explanation of Statement I.
    3. Statement I is true, but Statement II is false.
    4. Statement I is false, but Statement II is true.
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  14. Question 14

    NDA/NA 2011
    Bronze is often used to make statues and medals whereas brass is used in making utensils, scientific apparatus and cartridges. Both brass and bronze are copper containing alloys, yet they differ in their chemical composition for additionally containing.
    1. Zinc in brass and tin in bronze
    2. Chromium in brass and nickel in bronze
    3. Nickel in brass and tin in bronze
    4. Iron in brass and nickel in bronze
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  15. Question 15

    The brass is an alloy whose components are
    1. Copper and zinc
    2. Zinc and tin
    3. Copper and tin
    4. Copper, tin and zinc
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  16. Question 16

    Which one of the following does not contain silver?
    1. Lunar caustic
    2. German silver
    3. Horn silver
    4. Ruby silver
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  17. Question 17

    Silver gets corroded due to ____ in air.
    1. Oxygen
    2. Hydrogen sulphide
    3. Carbon dioxide
    4. Nitrogen
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  18. Question 18

    Which one of the following is called philosopher’s wool?
    1. Zinc chloride
    2. Zinc oxide
    3. Zinc nitrate
    4. Zinc bromide
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  19. Question 19

    Zinc gives hydrogen gas with sulphuric acid and hydrochloric acid but not with nitric acid.
    1. Zinc act oxidising agent when react with nitric acid
    2. Nitric acid is the weakest acid than sulphuric acid and hydrochloric acid
    3. In electrochemical series zinc is below hydrogen
    4. Nitrate ions (NO₃⁻) are reduced in preference to hydronium ion
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  20. Question 20

    Which one of the following metals is liquid at ordinary temperature?
    1. Lead
    2. Nickel
    3. Mercury
    4. Tin
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