1.

Two isomeric alkenes A and B having molecular formula, CH_(9)H_(9) Clon adding H_(2), A gives optically inactive compound while B gives a chiral compound. The two isomers are

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A is 3-chloro-1-pentene and B is 1-chloro-2- pentene
A is 2-chloro-3-methyl-2-butene and B is 1-chloro-3-methyl-1-butene
A is 3-chloro-2-pentene and B is 2-chloro-2- pentene
A is 4-chloro-2-pentene and B is 4-chloro-1- pentene.

Solution :Only OPTION (C) is correct as shown.
`CH_(3) CH_(2) underset(3 - "chloro-2 - pentene(A)")overset(CL) (C = CH -) CH_(3) overset(H_(2))(rarr) CH_(3)CH_(2)underset("OPTICALLY INACTIVE ")overset(Cl)overset(|)(- CH -) CH_(2) CH_(3)`
`CH_(3) CH_(2) underset(3 - "chloro-2 - pentene(B)")overset(Cl) (C = CH -) CH_(3) overset(H_(2))(rarr) CH_(3)CH_(2)underset("optically inactive ")overset(Cl)overset(.|)(- CH -) CH_(2) CH_(3)`


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