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One mole of a hydrocarbon contains 36g of carbon and its vapour density is 20. T...


Question

One mole of a hydrocarbon contains 36g of carbon and its vapour density is 20. The structure of the hydrocarbon is

Options

A) CH3C ≡ CH

B) CH3CH = CH2

C) CH3CH2C ≡ CH

D) CH3CH2 CH3


The correct answer is A.

Explanation:

2VD = Rmm VD = Vapour density; Rmm - Relative
2 * 20 = 40 Molecular mass
Mole of carbon = 36/12 = 3
Mole of H2 = 40 - 36 = 4
The compound contains 3 mole of carbon and 4 hydrogen

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Dicussion (1)

  • 2VD = Rmm VD = Vapour density; Rmm - Relative
    2 * 20 = 40 Molecular mass
    Mole of carbon = 36/12 = 3
    Mole of H2 = 40 - 36 = 4
    The compound contains 3 mole of carbon and 4 hydrogen

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