A cylinder of 5 litres capacity, filled with air at NTP is connected with another evacuated cylinder of 30 litres of capacity. The resultant air pressure in both the cylinders will be
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a
10.8 cm of Hg
b
14.9cm of Hg
c
21.8 cm of Hg
d
38.8 cm of Hg
answer is A.
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Detailed Solution
Given that P1=76cm of Hg (Initial pressure at N.T.P.)P2=?,V1=5 litre ,V2=30+5=35 litres According to Boyle's lawP1V1=P2V2:76×5=P2×35P2=76×535⇒P2=10.8cm of Hg