1.

[A]underset"catalyst"overset"lindlar's"larrCH_3-C-=C-CH_3underset(liq. NH_3)overset"Na in"to[B] [A] and [B] are respectively

Answer»

CIS, trans-2-butene
Both trans-2-butene
Trans, cis-2-butene
Both cis-2-butene

Solution :Alkynes give different product with different reducing AGENTS. With Lindlar's CATALYST `(Pb//BaSO_4)` or Ni powder, cis-alkenes are formed WHEREAS with NA in liquid ammonia (Birch reduction), trans-alkenes are formed


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