Question

Two glass bulbs A and B are connected by a very small tube of negligible volume having a stop cock. Volume of bulb A is 100 cm³ and it contains some gas. Bulb B is empty on opening the stop cock, the pressure dropped by 60%. The volume of Bulb B must be____.

• A. 100 $c{m}^3$
• B. 150 $c{m}^3$
• C. 200 $c{m}^3$
• D. 180 $c{m}^3$

Answer 1

The correct option is B

150 $c{m}^3$

If V is the volume of B , the total volume after opening stopcock is (100 = V) $c{m}^3$

$100\times P=\frac{⟮100+V⟯\times 40P}{100}\Rightarrow V=150c{m}^3$