Question

Pouring hot water to open the tightly closed lid is an application of :

• A. Thermal expansion in liquid
• B. Thermal expansion in solid
• C. Thermal expansion in gas
• D. Thermal expansion in both solid and liquid

Answer 1

Answer: (B)

Thermal expansion in solid

When we pour hot water on a tightly closed lid, it expands due to heat gained from hot water. Due to this heat lid expands and becomes loose. This is thermal expansion of solids.