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Solution


Q.

Choose the correct set of reagents for the following conversion.

trans (Ph–CH=CH–CH3)⟶cis (Ph–CH=CH–CH3)             [2023]
1 Br2,alc∙KOH,NaNH2,Na(Liq NH3)  
2 Br2,alc∙KOH,NaNH2,H2 Lindlar Catalyst  
3 Br2,aq∙KOH,NaNH2,H2 Lindlar Catalyst  
4 Br2,aq∙KOH,NaNH2,Na(LiqNH3)  

Ans.

(2)