The selectivity of a catalyst is its ability to direct a reaction to yield a particular product. 2-butyne can be converted to different products based on choice of catalyst.(A) and (B) are respectively

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Li/NH3, Lindlar catalyst

Lindlar catalyst, Li/ NH3

Cu, Pd/PdO

Pd/PdO,Cu

answer is A.

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Detailed Solution

Catalyst (A) converts 2-butyne into trans-isomer. Thus. (A) is Li/ NH3 and catalyst (B) converts it into cis-isomer. Thus, (B) is Lindlar's catalyst.

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