Among the isomeric alkanes of molecular formula `C_(5)H_(12)`, identify the one that on photochemical chlorination yields
(i) A single monochloride.
(ii) Three isomeric monochlorides.
(iii) Four isomeric monochlorides.

Explanation

`i H_(3) C- overset(CH_(3))overset(|)underset(CH_(3))underset(|)(C)- CH_(3)` All the hydrogen atoms are equivalent and replacement of any hydrogen will give the same product .
(ii) `C^(a) H_(3) C^(b) H_(2) C^(c) H_(2) C^(b) H_(2) C^(a) H_(3)` The equivalent hydrogen are grouped as a , b and c .The replacement of equivalent hydrogens will give the same product .
(iii) `C_(a)H_(3) underset(CH_(3))underset(|)C^(b) H C^(c) H_(2) C^(d) H_(3)` Similarly the equivalent hydrogens are grouped as a , b , c and d . Thus , four isomeric products are possible .