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

Answer: (A)

$\because 5.8L$ of gas has mass $=7.5g$
$\therefore 24.4L$ of gas has mass$=\frac{7.5}{5.8}\times 22.4=28.96$
So molecular weight $=29$
So, molecular formula of compound is $NO$