Question

Let 'p' be the initial pressure of a gas. If the volume of a given mass of the gas, at constant temperature, becomes three times, the pressure will be:

• A. 3p
• B. p/3
• C. 9p
• D. p

Answer 1

The correct option is B p/3

According to Boyle's law,

$P_1{V}_1=P_2{V}_2$

$p{V}_1=P_2.3V_1$

$\Rightarrow P_2=p/3$