Question

The ratio of volumes occupied by 1 mole $O_2$ and 1 mole $O_3$ under identical conditions of temperature and pressure is:

• A. 1 : 1
• B. 1 : 2
• C. 1 : 3
• D. 2 : 1

Answer 1

The correct option is A 1 : 1

From Avogadro's hypothesis volume is directly proportional to the number of moles of gases at constant temperature & pressure.

$\therefore V\propto n$ ( at constant T & P) here the nature of gas is not significant, only no. of moles matter.

i.e. no matter what are gases ( but it should behave ideally).

$\therefore$ For equal no. of moles of $O_2$ and $O_3$,

$\therefore \frac{V_{o_2}}{V_{O_3}}=\frac{n_{O_2}}{n_{O_3}}=\frac{1}{1}$