WBCS.LIVE practice question

The density of water at 20°C is 998 kgm-3 and that at 40°C is 992 kgm-3. The coefficient of the cubical expansion of water is

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 2 × 10-4 °C-1
  2. 6 × 10-4 °C-1
  3. 3.00 × 10-4 °C-1
  4. 4 × 10-4 °C-1

Correct answer and explanation

Correct answer: 3.00 × 10-4 °C-1

Explanation: ✅ Correct Answer: C) 3.00 × 10-4 °C-1 📚 Explanation: The coefficient of cubical expansion for water is calculated using the change in density over a specific temperature range. It measures how much the volume of water expands per degree of heat. Calculation using the given numbers results in a value of 3.00 x 10^-4 per degree Celsius. This property is important for understanding how liquids behave when they are heated.