(a) Draw the structure of major monohalogen product formed in the following reaction:

(b) Arrange the following in increasing order of boiling point: 
(i)CH3CH2CH2CH2Br 
(ii)(CH3)3.Br 
(iii) (CH3)2C.Br

OR

(a) Write the IUPAC name of

(b) Which compound in the following pair undergoes faster SN1 reaction.