Question

Four 1 litre flasks are separately filled with $S{O}_2,S{O}_3,Ar,$ and $C{H}_4$ gases at the same temperature and pressure. The ratio of the total number of atoms of these gases present in the different flasks would be?

• A. $1:1:1:1$
• B. $3:4:1:5$
• C. $4:3:1:5$
• D. None

Answer 1

The correct option is B $3:4:1:5$

Avogadro's Law:
Equal volumes of gases at the same temperature and pressure have the same number of molecules.
Given molecules: $n_{S{O}_2}{n}_{S{O}_3}{n}_{Ar}{n}_{C{H}_4}$
Thus ratio of molecules $=1:1:1:1$
Ratio of atoms $=3:4:1:5$