Question

Paheli fixes two balloons on the mouth of two bottles, say A and B. A is kept in the sun and B is kept in the refrigerator for an hour. Pick the correct observation for Paheli's experiment

• A. Balloons in both A and B expand
• B. Balloons in both A and B contract
• C. Balloon in A contracts and in B expands
• D. Balloon in A expands and in B contracts

Answer 1

The correct option is D Balloon in A expands and in B contracts

Since A is kept in sun the air inside the bottle will get heated and the molecules of air will gain energy and will move farther from each other and occupies more space now.In other words hot air expands.So the baloon attached to A will expand.

Since B is kept in refrigerator the air inside the bottle will get cool and the molecules of air will lose heat energy to environment and will move closer to each other because of reduced motion.And occupies less space now.In other words cold air contracts.So the baloon attached to B will contract.