Elimination Reaction

Q.

Which of the following is/are elimination reaction(s)?

1. $C{H}_{3}C{H}_{2}Cl+KOH\left(alc\right)\to C{H}_2=C{H}_2+HCl$

2. $C{H}_{3}C{H}_{2}OH+H_{2}S{O}_4\to C{H}_2=C{H}_2+H_{2}O$

3. $C{H}_2=C{H}_2+H^{+}\to C{H}_3-C{H}_2$

4. Both (a) and (c)

Q. Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?

1. 
2. 
3. 
4. 

Q. Which of the following compounds shall not produce propene by reaction with HBr followed by elimination or direct only elimination reaction ?

1. 
2. 
3. 
4.