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The correct order of heat of combustion for following alkadienes is (i) (ii) (iii)

Options

  1. A(i) < (ii) < (iii)
  2. B(ii) < (iii) < (i)
  3. C(i) < (iii) < (ii)
  4. D(iii) < (ii) < (i)

Correct answer

A. (i) < (ii) < (iii)

Step-by-step solution

In lsomers of Hydrocarbon heat of combustion depends upon their stability. As stability increases, heat of combustion decreases. trans-alkenes are more stable than cis-alkenes Stability ∝ 1 H e a t of combustion Stability a > b > c Heat of combustion c > b > a

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