Question

Assertion : The size of a hydrogen balloon increases as it rises in air.
Reason : The material of the balloon can be easily stretched.

• A. if both assertion and reason are true and the reason is the correct explanation of the assertion
• B. if both assertion and reason are true and the reason is not the correct explanation of the assertion
• C. if assertion is true but reason is false
• D. if both assertion and reason are false statements

Answer 1

Answer: (B)

As balloon rises, atmosphere's pressure decreases but pressure inside balloon remains same so balloon's inner pressure become more and balloon's size increases due to pressure difference.