A hydrocarbon of molecular mass 72 g `mol^(-1)` gives a single monochloro derivative and two dichloro derivatives on photo chlorination. Give the structure of the hydrocarbon.

Explanation

`C_(5)H_(12)`, Pentane has molecular mass 72 g `mol^(-1)`. Neo-pentane yield monochlorinated product because all 1,2-hydrogen are equivalent.
`CH_(3)-overset(CH_(3))overset("| ")underset(CH_(3))underset("| ")("C ")-CH_(3) overset(Cl_(2))underset(" Light ")rarr CH_(3)-overset(CH_(3))overset("| ")underset(CH_(3))underset("| ")("C ")-CH_(2)Cl`
Dichloro derivatives :
`underset((i))(CH_(3)-overset(CH_(3))overset("| ")underset(CH_(3))underset("| ")("C ")-CHCl_(2))`
`CH_(3)-overset(CH_(2)-Cl" ")overset("| ")underset(CH_(2)-Cl" ")underset("| ")(C-CH_(3))`