Question

When ethene reacts with bromine in aqueous sodium chloride solution the product/(s) obtained is /(are):

• A. ethylene dibromide only
• B. ethylene dibromide and 1-bromo-2-chloroethane
• C. 1-bromo-2-chloroethane only
• D. ethlylene dichloride only

Answer 1

The correct option is B ethylene dibromide and 1-bromo-2-chloroethane

when ethylene reacts with bromine in presence of sodium chloride(aqueous) ethylene dibromide and 1-bromo-2-chloro ethylene are formed.

$C_2{H}_4+B{r}_2\to C_2{H}_{4}B{r}^{+}+B{r}^{-}$

$C_2{H}_{4}B{r}^{+}+C{l}^{-}\to BrC{H}_{2}C{H}_{2}Cl$

Here eheylene first undergoes bromination to form ethylene dibromide on further reaction with aqueous sodium chloride it forms 1-bormo-2-chloroethane as a product.