JEE Mains Chemistry Past PapershardMCQ SINGLE

Choose the correct set of reagents for the following conversion. trans (Ph–CH=CH–CH3) cis (Ph–CH=CH–JEE Mains Chemistry Past Papers Chemistry Question

Question

Choose the correct set of reagents for the following conversion. trans (Ph–CH=CH–CH3) cis (Ph–CH=CH–CH3) (A) Br2, alc KOH, NaNH2, Na (Liq NH3) (B) Br2 , alc KOH, NaNH2, H2 Lindlar Catayst (C) Br2, alc KOH, NaNH2, H2 Lindlar Catayst (D) Br2, aq KOH, NaNH2, Na (Liq NH3)

Answer: B

💡 Solution & Explanation

C=C CH3 H H Ph Trans    Br Br Br H H CH3 Ph enation log Dehydroha NaNH , KOH . alc 2         Ph–CC–CH3       . cat lindlar  C=C H CH3 H Ph Cis

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