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Question

Chemistry Question on Hydrocarbons

2-Hexyne gives trans-2-hexene on treatment with

A

Li/NH3Li/NH_3

B

Pd/BaSO4Pd/BaSO_4

C

LiAlH4LiAlH_4

D

Pt/H2Pt/H_2

Answer

Li/NH3Li/NH_3

Explanation

Solution

Alkynes on treatment with alkali metals in liquid ammonia gives trans hydrogenation product:
CH3−C≡C−CH2−CH2−CH3→  Li/NH3  CH_3 - C \equiv C - CH_2 -CH_2 -CH_3 \xrightarrow{\, \, Li/NH_3 \, \, }