Home PYQs UPPSC UPPSC MCQs Prelims 2009 (GS Paper I)

Question

Assertion (A): Lighting a candle in space does not produce a flame.
Reason (R): A flame exists due to the pull of gravity.

In the context of the above, which one of the following is correct?

  1. Both (A) and (R) are true and (R) is the correct explanation of (A).
  2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
  3. A) is true, but (R) is false.
  4. (A) is false, but (R) is true.

Answer:

Option A: Both (A) and (R) are true and (R) is the correct explanation of (A).

Detailed Solution:

The correct answer is “Both (A) and (R) are true and (R) is the correct explanation of (A).”.

In a microgravity environment in space, a flame can be generated by burning a candle, but it is not possible in a true vacuum. The flame behaves differently due to the absence of gravitational force in space.