Question

A gaseous mixture was prepared by taking equal moles of $CO$ and $N_2.$ If the total pressure of the mixture was found $1$ atmosphere, the partial pressure of the nitrogen $(N_2)$ in the mixture is

• A. 0.8 atm
• B. 0.9 atm
• C. 1 atm
• D. 0.5 atm

Answer 1

Answer: (D)

0.5 atm

Answer 2

Equal moles of $CO$ and $N_{2}$
$n_{C O}=n_{N_{2}}$

then, according to ideal gas equation,

pressure of both gases $CO$ and $N_{2}$ becomes equal

$\therefore p_{C O}=p_{N_{2}}$

Given, $p_{c o}+p_{N_{2}}=$ Total pressure of mixture,

or $2 p_{N_{2}}=1$ atm

or $p_{N_{2}}=0.5$ atm