The optically inactive compound from the following is :-

Options

A. 2-chloropentane
B. 2-chloropropanal
C. 2-chloro-2-methylbutane
D. 2-chlorobutane

Answer

C

Explanation

`underset("(optically active)")(H_(3)C-overset(Cl)overset(|)underset(H)underset(|)C-CH_(2))-CH_(2)-CH_(3)`
`underset("(optically active)")(H_(3)C-overset(H)overset(||)underset(Cl)underset(|)C-overset(O)overset(||)C-H)`
`underset("groups "(-CH_(3))"present on same C-atom)")underset("(Optically inactive because two same")(H_(3)C-overset("Cl ")overset("| ")underset(CH_(3))underset("| ")"C "-CH_(2)-CH_3)`
`H_(3)C-overset(Cl)overset(|)underset(H)underset(|)C-CH_(2)-CH_(3)` (optically active)