(a)[1]
Fill in Table 1.1 to show the colour of chlorine, bromine and iodine at $293\text{ K}$.
(b)[3]
State the trend in volatility of the halogens chlorine, bromine and iodine. Explain your answer.
(c(i))[1]
Construct an ionic equation for the reaction of bromine with sodium iodide.
(c(ii))[1]
State the role of bromine in the reaction. Explain your answer.
(d(i))[1]
Write an equation to describe the acid-base reaction that occurs when concentrated sulfuric acid reacts with sodium bromide, $\text{NaBr}$.
(d(ii))[3]
Deduce which sodium halide, $\text{NaCl}$, $\text{NaBr}$ or $\text{NaI}$, produces the largest percentage yield of hydrogen halide when concentrated sulfuric acid is added. Explain your answer by considering the relative reactivity of the halide ions as reducing agents.