When `H_(2)` is added to two isomeric alkenes A and B having molecular formula `C_(5)H_(9)Cl`, A gives optically inactive compound while B gives a chiral compound. The two isomers are

Options

A. A is 3-chloro pent-1-ene and B is 4-chloro pent- 2-ene
B. A is 4-chloro pent-1-ene and B is 2-chloro pent 2-ene
C. A is 1-chloro pent-1-ene and B is 1-chloro pent-2-ene
D. A is 1-chloro pent-1-ene and B is 5-chloro pent-1-ene

Answer

A

Explanation

`underset("3-chloro-pent-1-ene")underset("(A)")(CH_(3)CH_(2)overset("Cl ")overset("| ")"CH"CH)=CH_(2)+H_(2)rarr underset("3-chloropentane")underset("(Achiral)")(CH_(3)CH_(2)overset("Cl ")overset("| ")"CH"CH_(2)CH_(3))`
`underset("4-chloro-pent-2-ene")underset("(B)")(CH_(3)-overset("Cl ")overset("| ")"CH"-CH=CHCH_(3))overset(H_(2))rarr underset("2-chloropentane")underset("(Chiral)")(CH_(3)-overset("Cl ")overset("| ")"CH"-CH_(2)CH_(2)CH_(3))`