question_answer

Hydrogenation of the given compound in the presence of poisoned palladium catalyst gives

A) An optically active compound

B) An optically inactive compound

C) A racemic mixture

D) A diastereomeric mixture

Correct Answer: B

Solution :

Addition on triple bond takes place by the .syn-addition of hydrogen in presence of poisoned palladium catalyst. Since the configuration of the double bond already present is cis, the compound formed will have a plane of symmetry and hence optically inactive.