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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

There is an explanation video available below.

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