Formation of free radical takes place with absorption of minimum energy in the formation of : (a) (b) (c) (d)

Stability of free radical is 3o >2o >1o. 29. Following reaction (CH3)3CBr + H2O -> (CH3)3COH + HBr is an example of (a) elimination reaction (b) free radical substitution (c) nucleophilic substitution (d) electrophilic substitution So in this reaction bromine is replaced with hydroxyl ion, so this reaction is a substitution reaction. And we know that the hydroxyl ion has a negative charge so it is a nucleophile. So, the reaction is a Nucleophilic substitution reaction. 30. The increasing order of reactivity of the following bromides in SN1 reaction is (I) (II) Br (III) (IV) Br