These questions consist two statements each, printed as Assertion and reason, while answering these question you are required to choose any one of the following four responsis:
(a) If both the assertion and reason are true and reason is a true explanation of the assertion.
(b) If both the assertion and reason are true but the reason is not the correct explanation of assertion.
(c ) If the assertion is true but reason is false.
(d) If both the assertion and reason are false.
Q. Assertion: The size of hydrogen bolloon increases as it rises in air.
Reason: The material of the bolloon can easily stretched.

Answer

A

Explanation

A hydroges bolloon or weather balloon carries instruments aloft to send beck information on atmospheric pressure temperature and humidity by means of a small expendable measuring device. The balloon itself produces the lift and is usually made of a highly flexible latex material. The ascent rate can be controlled by the amount of gas the balloon is filled with weather balloon's reach sufficient heights due to diminishing pressure causing the balloon to expand to such a degree that it disintegrates.