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MHTCET 22 Apr 2025 Shift 1 Paper

Question : 62 of 150

Marks: +1, -0

\mathrm{O}_{2}

gas?

Solution:

Concept:

Vapour density is the ratio of the molar mass of a gas to the molar mass of hydrogen gas, which is taken as

2

Thus,

V.D. = \frac{\text{Molar mass of gas}}{2}

Explanation:

For

\mathrm{O}_{2}

gas, the molar mass is:

M(\mathrm{O}_{2}) = 2 \times 16 = 32 \, \text{g mol}^{-1}

Now apply the formula:

V.D. = \frac{32}{2} = 16

Answer:

The vapour density of

\mathrm{O}_{2}

gas is

16

, which is Option B.

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