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MHT CET Chemistry Aldehydes and Ketones 2026 MHT CET 2026 (11 April Shift 2)

MHT CET Chemistry Question (2026) — Solution

Question

In Gatterman reaction, which of the following catalyst is used?

Options

  1. A. CO, HCl and anhyd. AlCl _3
  2. B. Copper powder and HBr
  3. C. Cu + Aq. NaNO _2
  4. D. KOH + Br _2

Answer

B. Copper powder and HBr

Step-by-step solution

The Gatterman reaction is a modification of the Sandmeyer reaction used for the synthesis of aryl halides from aryl diazonium salts. In this reaction, finely divided copper powder is used as a catalyst along with a halogen acid such as HCl or HBr . Ar-N _2^+ X ^- Cu powder / HX Ar-X + N _2 Option (318007) represents the reagents for the Gatterman-Koch formylation reaction. Option (318010) represents the reagents for the Hoffmann bromamide degradation reaction. Therefore, copper powder and HBr are used in the Gatterman reaction. Answer: Copper powder and HBr

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