(a(i))[1]
Define the term addition reaction.
(a(ii))[1]
Describe how $\text{Cl}_2$ is used to make HOCl.
(a(iii))[1]
State one use of HOCl.
(b)[4]
Complete Fig. 6.1 so that it shows the mechanism for the reaction between HOCl and $\text{CH}_2{=}\text{CH}_2$ forming $\text{HOCH}_2\text{CH}_2\text{Cl}$. Add charges, dipoles, lone pairs of electrons and curly arrows where needed.
(c(i))[1]
State the reagent and the conditions for step 1.
(c(ii))[1]
Identify the reaction type that occurs in step 2.
(c(iii))[1]
Complete the equation for step 2. $\text{HOCH}_2\text{CH}_2\text{CN} + \ldots$