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Q.

Which of the following is (are) examples of Birch reduction

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a

H3C−C≡C−CH3  →Liq.NH3Na  H3C−CH=CH−CH3                                                              cis-But-2-ene

b

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c

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d

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answer is A, C.

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Detailed Solution

A and C are perfect examples of Birch reduction, because electron donating groups always appear on one side of double bonded carbon atom, but electron withdrawing groups are not on the carbon atom involved in a double bond.

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