In the following questions, Statement of assertion (A) is followed by a statement of reason (R). 1. If both assertion and reason are true and the reason is the correct explanation of the assertion, then mark. 2. If both assertion and reason are true but the reason is not the correct explanation of the assertion, then mark. 3. If assertion is true statement but reason is false, then mark. 4. If both assertion and reason are false statements then mark.
Assertion: The size of a hydrogen balloon increases as it rises in air. Reason: The material of the balloon can easily stretched.A) 1
B) 2
C) 3
D) 4
Correct Answer: B
Solution :
A hydrogen balloon or weather balloon carries instruments aloft to send back 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 balloons reach sufficient heights due to diminishing pressures causing the balloon to expand to such a degree that it disintegrates.
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