Question

At constant temperature 200 $cm^3$ of $N_2$ at 720 mm and 400 $cm^3$ of 02 at 750 mm pressure are put together in a one litre flask. The final pressureof mixture is

• A. 111 mm
• B. 222 mm
• C. 333 mm
• D. 444 mm

Answer 1

Answer: (D)

444 mm

Answer 2

$P_{N_2} = \frac{200 \times 720}{1000}$ = 144 mm

$P_{O_2} = \frac{400 \times 750}{1000}$ = 300 mm

$\therefore$ $P_{Total} = P_{N_2} + P_{O_2}$
$P_{Total} = 144 + 300$
$P_{Total} = 444 \ mm$

So, the correct option is (D): $444 \ mm$