Multiple choice

A mixture of two gases CO and $N_2$ are present in a container in 2:1 volume ratio. The vapour density of mixture is:

  1. 28

  2. 42

  3. 56

  4. 14
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D Correct answer
Explanation

Molar mass of CO = 28, N2 = 28. Since both have the same molar mass, the mixture's average molar mass is 28. Vapour density = Molar mass / 2 = 28 / 2 = 14.

AI explanation

The vapour density of a gas is half of its molecular mass. In a 2 to 1 volume ratio, the average molecular mass of the carbon monoxide and nitrogen mixture is (28 plus 28 plus 28) divided by 3, which equals 28. Therefore, the vapour density of the mixture is 28 divided by 2, which is 14.

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