MHT CET 2021 Physics Solved Paper

(d) From ideal gas equation, pV=nRT
For isothermal process, temperature remains constant,
So, for one mole of gas,
pV=‌ constant ‌
So, if pressure decreases, then volume increases.
⇒p1V1=p2V2
‌ Here, ‌‌p2=p1(1−‌

1

10

)=‌

9

10

p1
⇒V2=‌

10

9

V1
∴ Percentage increase in volume
‌‌=(‌

V2−V1

V1

)×100
‌‌=(‌

10

9

−1)×100
‌‌=‌

1

9

×100=11.1%