Question:

Which of the following reactions are complex reactions? (i) Oxidation of ethane
(ii) Thermal decomposition of HI on gold surface
(iii) Saponification of methyl acetate
(iv) Nitration of phenol
(v) Decomposition of $NH_3$ on hot Pt surface

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Organic reactions with intermediates are usually complex.
Updated On: Apr 24, 2026
  • (i) and (iii)
  • (ii) and (iv)
  • (i) and (iv)
  • (ii) and (v)
  • (i) and (v)
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The Correct Option is C

Solution and Explanation

Concept:
• Complex reactions involve multiple steps and intermediates

Step 1:
Analyze reactions
(i) Oxidation of ethane → complex (multi-step)
(ii) Surface decomposition → simple
(iii) Saponification → simple
(iv) Nitration → complex mechanism
(v) Surface reaction → simple Final Conclusion:
Option (C)
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