Which of the following compounds is not chiral ?

Options

A. 1-Chloropentane
B. 2-Chloropentane
C. 1-Chloro-2-methylpentane
D. 3-Chloro-2-methylpentane

Answer

A

Explanation

To be optically active the compound or structure should possess chiral or asymmetric centre but in the rest of the structure it is present.
`underset("1-chloropentane")(H-underset(H)underset(|)overset(Cl)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-H)`
`underset("2-chloropentane")(H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(Cl)overset(|)(**C)-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-H)`
`underset("1-chloro-2-methyl pentane")(H-underset(H)underset(|)overset(Cl)overset(|)C-underset(H)underset(|)overset(CH_(3))overset(|)(**C)-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-H)`
`underset("3-chloro-2methyl pentane")(H-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(CH_(3))overset(|)(**C)-underset(H)underset(|)overset(H)overset(|)(**C)-underset(H)underset(|)overset(H)overset(|)C-underset(H)underset(|)overset(H)overset(|)C-H)`