Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is(are)
← JEE Advanced 2015 · Paper 1
ChemistryMultiple correct+4 / -2Question 29 of 60
JEE Advanced 2015 · Paper 1, Chemistry question 29
Answer and worked solution
Official answer: B, D
- (A) Hydrogenation gives 2-bromopentane, which is still chiral. Optically active.
- (B) 3-Bromopent-1-ene gives 3-bromopentane: two ethyl groups on C3, so achiral. Inactive.
- (C) Gives 2-bromo-3-methylbutane, still chiral. Optically active.
- (D) The enantiomer of (B) gives the same achiral 3-bromopentane. Inactive.
(B), (D)