Question

An organic compound has a vapour density of 22. The molecular formula of the organic compound is ______.

[Atomic weight: C = 12, H = 1]

Options

• CH₄

• C₂H₄

• C₂H₆

• C₃H₈

Answer 1

An organic compound has a vapour density of 22. The molecular formula of the organic compound is C₃H₈.

Explanation:

Vapour density (VD) = `"Molecular mass"/2`

Molecular mass = VD × 2

= 22 × 2

= 44

Molecular Mass of C₃H₈ gas is 44 g/mol.

The only hydrocarbon with a molecular mass of 44 is C₃H₈ (propane).