Number of bromo derivatives obtained on treating ethane with excess...

A substitution reaction is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group.The number of different substitution products possible when ethane is allowed to react with bromine in sunlight are $9$.

${CH}_{3} - {CH}_{3} + {Br}_{2}\overset{sunlight}{\to}{CH}_{3} - {CH}_{2}Br + {CH}_{2}Br - {CH}_{2}Br + {CH}_{2}Br - {CHBr}_{2} + {CHBr}_{2} - {CHBr}_{2} + {CBr}_{3} - {CBr}_{3} + {CH}_{3} - {CHBr}_{2} + {CH}_{3} - {CBr}_{3} + {CH}_{2}Br - {CBr}_{3} + {CHBr}_{2} - {CBr}_{3}$

$6$ Bromine atoms: $1$ product possible

$5$ Bromine atoms : $1$ product possible

$4$ Bromine atoms : $2$ products possible

$3$ Bromine atoms : $2$ products possible

$2$ Bromine atoms : $2$ products possible

$1$ Bromine atom : $1$ product possible

Total $9$ products possible