Question

Air is pumped into a cycle tyre. Which of the following statements is correct?

(1) Volume increases, pressure decreases and Boyle’s law is obeyed

(2) Volume decreases and pressure increases and Boyle’s law is obeyed

(3) Volume increases and pressure also increases, Boyle’s law not obyed

(4) Volume increases, pressure increases but Boyle’s law is not obeyed

Answer 1

(3) Volume increases and pressure also increases, Boyle’s law not obyed

Volume and pressure both increases, and Boyle’s law is not followed, because Boyle’s law is applicable only for the fixed mass of a gas, but in this case air molecules are pumped into the tyre, hence mass of air in the tyre increases.