Bromination

Q. When butene-1 is mixed with excess of bromine, the expected reaction product is

1. 1, 2-dibromobutane
2. 1, 1-dibromobutane
3. 2, 2-dibromobutane
4. Perbromobutane

Q. Ethene when treated with $B{r}_2$ in the presence of $CC{l}_4$ which compound is formed

1. 1, 2-dibromoethane
2. 1-bromo-2-chloroethane
3. Both (a) and (b)
4. 1, 1, 1-tribromoethane

Q. 2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly

1. 1-bromo-2-methylbutane
2. 2-bromo-2-methylbutane
3. 2-bromo-3-methylbutane
4. 1-bromo-3-methylbutane

Q. Among the given free radical bromination reactions, the reaction(s) in which $3^{\circ }$ halide is a major product is /are :

1. 
2. 
3. 
4.