`n-`pentane and iospentane can be distinguished by

Options

A. `Br_(2)`
B. `O_(3)`
C. Conc. `H_(2)SO_(4)`
D. `KMnO_(4)`

Answer

D

Explanation

On oxidation, with `KMnO_4` they give different alcohols
`underset("n-pentane")(CH_(3)CH_(2)CH_(2)CH_(2)CH_(3)) overset(KMnO_4)underset([O]) rarr underset(1^@ "alcohol")(CH_(3)CH_(2)CH_(2)CH_(2)CH_(2)OH) CH_(3)-underset(CH_3)underset(|)(CH)-CH_3 overset(KMnO_4)underset([O])rarrCH_(3)underset(3^@ "alcohol")(CH_2-overset(OH)overset(|)underset(CH_3)underset(|)C-CH_(3)`