2024 Re-NEET Thermal Properties of MatterThermal conduction and insulation Medium Question 3 of 49 in Thermal Properties of Matter

Houses made of concrete roofs overlaid with foam keep the room hotter during summer.

A Both A and R are true and R is the correct explanation of A
B Both A and R are true but R is NOT the correct explanation of A
C A is true but R is false
D A is false but R is true

The answer is D.

Solution

The foam layer forms an insulation that prohibits heat transfer (it contains trapped air pockets, which are poor conductors of heat). Hence roofs with foam insulation actually keep the room cooler, not hotter, during summer — so Assertion A is false while Reason R is true.

Concept Thermal conduction and insulation

Thermal Properties of Matter in past papers

49 questions from this chapter have appeared across 25 exam years.