Preparation of Haloalkane from Alkene

Q. Identify the set of reagent/reaction conditions ‘X’ and ‘Y’ in the following set of transformations:
$C{H}_3-C{H}_2-C{H}_{2}Br\stackrel{X}{\to }Product\stackrel{Y}{\to }C{H}_3-\underset{\stackrel{|}{Br}}{C}H-C{H}_3$

1. X = dilute aqueous NaOH, ${20}^{\circ }C$ ; Y = HBr/acetic acid, ${20}^{\circ }C$
2. X = concentrated alcoholic NaOH, ${80}^{\circ }C$ ; Y = HBr/acetic acid, ${20}^{\circ }C$
3. X = dilute aqueous NaOH, ${20}^{\circ }C$ ; $Y=\frac{B{r}_2}{CHC{l}_3}$, $0^{\circ }C$
4. X = concentrated alcoholic NaOH, ${80}^{\circ }C$; $Y=\frac{B{r}_2}{CHC{l}_3}$, $0^{\circ }C$

Q. The product of the reaction given below is:

1. 
2. 
3. 
4. 

Q.
The above reaction occurs at $60{}^{o}C$. What is the major product B?

1. 
2. 
3. 
4. 

Q.

The product of the following reaction :

[RPET 2000]

1. 

2. 

3. 

4.