1.

Of the isomeric haexanes, the isomers that give the minimum and maximum number of monochloro derivatives are, respectively,A. `3`-methylpentane and `2,3`-dimethylbutaneB. `n`-hexane and `2,3`-dimethylbutaneC. `2,3`-dimethylbutane and `2`-methylpentaneD. `2,2`-dimethylbutane and `2`-methylpentane

Answer» Correct Answer - C
`n`-hexane gives `3` isomers, `2,3`-dimethylbutane gives `2`-isomers, and `2,2`-dimethylbutane gives `3` isomers:
`overset(1_(a)^(@))(CH)_(3)underset(2-"Methylpentane")(underset(1_(a)^(@)CH_(3))underset(|)overset(3^(@))(CH)overset(2_(a)^(@))(CH_(2))overset(2_(b)^(@))(CH_(2))overset(1_(b)^(@))CH_(3))` , `overset(1^(@))CH_(3)underset(2,3-"Dimethylbutane")(underset(1^(@)CH_(3))underset(|)overset(2^(@))(CH)underset(CH_(3))underset(|)overset(2^(@))(CH)underset(1^(@))overset(1^(@))(CH_(3))`


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