Question

One litre of an unknown gas weighs 1.25 g atrrr which of the following gas pertains to the above data

• A. $C{O}_2$
• B. $N{O}_2$
• C. $N_2$
• D. $O_2$

Answer 1

Answer: (C)

Mass of 1L of a gas at N.T.P. = 1.25 g
mass of 22.4 L of the gas at N.T.P.
= 1.25 $\times$ 22.4 = 28 g
$\therefore$ Gas is $N_2$ (Mol mass of $N_2$ = 28)