Question

What happens to the density of a fluid on heating?

• A. Decreases with increase in temperature.
• B. Increases with increase in temperature.
• C. Increases with decrease in temperature.
• D. Decreases with decrease in temperature.

Answer 1

Answer: (A), (C)

The correct options are
A

Decreases with increase in temperature.

C

Increases with decrease in temperature.

On heating fluid, it expands and on cooling it contracts but their masses remain unchanged.

So on increasing the temperature, the volume of fluid increases, hence density decreases.

Similarly, on decreasing the temperature, the volume of fluid decreases, hence density increases.