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Two gases bulbs A and B are connected b...

Two gases bulbs `A` and `B` are connected by a tube having a stopcock. Bulb `A` has a volume of `100 mL` and contains `H_(2)` gas . After opening the gas from `A` to the evacuated bulb `B` , the pressure falls down by `40%`. The volume `(mL) of `B` must be

A

75

B

150

C

125

D

200

Text Solution

Verified by Experts

The correct Answer is:
B
Applying Boyle's law
`P_(A)V_(A)=(0.40P_(A))(V_(A)+V_(B))`
`P_(A)xx100=0.40P_(A)(100+V_(B))`
or `100=0.4(100+V_(B))`
or `100+V_(B)=250`
or `V_(B)=150 mL`.
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