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Two glass bulbs A and B are connected by...

Two glass bulbs A and B are connected by a very small tube having a stop cock. Bulb A has a volume of 100 `cm^(3)` and contained the gas, while bulb B was empty. On opening th stop cock. The pressure fell down to 40%. The volume of the bulb B must be:

A

`200`

B

`125`

C

`66`

D

`75`

Text Solution

Verified by Experts

The correct Answer is:
C
According to Boyle's law , at constant `n` and `T` , we have
`p_("initial") V_("initial") = p_("final")V_("final")`
`p_(A)V_(A) = 0.6p_(A)(V_(A) + V_(B))`
`p_(A)(100) = 0.6 p_(A) (100 + V_(B))`
`100 = 0.6 (100 + V_(B))`
` 166 = 100 + V_(B)`
or `V_(B) = 166 - 100 = 66`
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