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Q.

Temperature remaining constant, the pressure of gas is decreased by 20%. The percentage change in volume

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a

Increases by 20%

b

Decreases by 20%

c

Increases by 25%

d

Decreases by 25%

answer is C.

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Detailed Solution

According to Boyle’s law , P1V1=P2V2P is pressure, V is volume of gasAs the pressure is decreased by 20% thereforeP2=80100P1P1V1=P2V2P1V1=80100P1V2V1=80100V2     ∴percentage increase in volume  =V2−V1V1×100=100−8080×100=25% increase.
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