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When 2-butyne is heated with hydrogen gas in the presence of Pd- BaSO4 dissolved in Quinoline, The product is

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a
cis-2-butene
b
Trans -2-butene
c
1-butene
d
2-Hydroxybutane

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detailed solution

Correct option is A

The reaction of alkynes with poisonised catalytic hydrogenation always gives rise to the cis product due to the fact that it is undergoing the addition of Hydrogen via a cyclic transition state.

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