@ Vivek
For question 3) your answer is not correct as per key
it is not even elimination and neither no rxn.(according to key)
For ques 1 why do you think that Br will go to 3° carbon
+ HBr ------(in Non polarizing medium)------>
Ph--S--CH2--CH2--CH2--Cl -----(NaOD/D2O)----->
1. I think Br will go at the 3 degree carbon and not as shown by ADITYA
3. The non aromatic Br will be replaced by OH.
2. Cl will be replaced by OD (Unsure!!)
@ Vivek
For question 3) your answer is not correct as per key
it is not even elimination and neither no rxn.(according to key)
For ques 1 why do you think that Br will go to 3° carbon
@Aditya
may be you are correct
but I don't know the answer as it was an objective question and the answer was none of these