Given below are two statements: one is labelled as Assertion A and… | JEE Main 2023 (6 Apr, Shift 1)

Q28JEE Main 2023 · 6 APR · SHIFT 1Easy

Escape Velocity

Given below are two statements: one is labelled as Assertion $\mathbf{A}$ and the other is labelled as Reason $\mathbf{R}$ .

Assertion A: Earth has atmosphere whereas moon doesn't have any atmosphere. Reason R: The escape velocity on moon is very small as compared to that on earth. In the light of the above statements, choose the correct answer from the options given below:

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Answer: (c)

Moon's escape speed (about 2.4 km/s) is small, so gas molecules with thermal speeds escape; earth's (11.2 km/s) is large enough to hold air.
So A is true, R is true, and R explains A.
So the answer is (c).

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