Question

$\bold {SOLVE!}$
At constant temp. On increasing the pressure of gas by 5%it's volume will decrease by
(A)5%
(B)5.26%
(C)4.26%
(D)4.76%
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Answer 1

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YOUR ANSWER
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ACCORDING TO BOYLE'S LAW,

PV = constant

=> P1V1 = P2V2

HERE P2 = P1 + P1/20

OR P2 = 21/20P1 -------------(1)

SUBSTITUTING IT IN EQN.(1) WE GET,

V2 = 20/21 V1

OR V2 = 0.9524 V1

THUS V2 IS 95.24%OF V1.
IN OTHER WORDS VOLUME DECREASES BY 4.76%

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