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

Chemistry

JAMB 2006

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

A. CH₃C ≡ CH
B. CH₃CH = CH₂
C. CH₃CH₂C ≡ CH
D. CH₃CH₂ CH₃

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Correct Answer: Option 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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One mole of a hydrocarbon contains 36g of carbon and its vapour density is 20....

Correct Answer: Option A

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