Question

7.5 grams of a gas occupy 5.8 litres of volume at STP the gas is

• A. $NO$
• B. $N_{2}O$
• C. $CO$
• D. $C{O}_2$

Answer 1

The correct option is A $NO$

$\because$ 5.8L of gas has mass = 7.5 gm
$\therefore 22.4L"""=\frac{7.5}{5.8}\times 22.4=28.96$
So molecular weight = 29
So, molecular formula of compound is NO