Question

Give reason as to why the density of a substance (except water) decreases with increase in temperature.

• A. because the mass of the substance decreases with an increase in temperature
• B. because the mass of the substance increases with an increase in temperature
• C. because the volume of the substance decreases with an increase in temperature
• D. because the volume of the substance increases with an increase in temperature

Answer 1

The correct option is D because the volume of the substance increases with an increase in temperature

All substance expand on heating and contract on cooling but the mass of a substance remains unchanged Therefore the density of a substance decreases with increase in temperature.