Multiple choice

Consider the following statements: (i) Compressed air coming out from a punctured ball becomes hotter. (ii) A sudden fall in the reading of a barometer indicates the sign of coming storm.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Statement 1 is incorrect. Compressed air coming out from a punctured ball becomes cooler as every expanding gas produces cooling effect. Statement 2 is correct. Barometer is a scientific instrument used to measure the atmospheric pressure. From a sudden fall in mercury of a barometer, a thunderstorm may be expected.