(a(i))[1]
Predict astatine's colour.
(a(ii))[1]
Describe the trend shown by the boiling points of the halogens.
(a(iii))[2]
Deduce the state of chlorine at $-50\,^{\circ}\text{C}$. Explain your answer.
(b(i))[2]
Complete the word equation for bromine reacting with aqueous potassium astatide. bromine + potassium astatide $\rightarrow$ [BLANK] + [BLANK]
(b(ii))[1]
Suggest why bromine has no reaction with aqueous potassium chloride.
(c)[2]
Complete the table, then calculate the relative molecular mass of compound X.
(d)[2]
Describe how methyl orange could be used to tell hydrochloric acid and sodium hydroxide solutions apart.
(e)[3]
Draw a labelled diagram to show how the apparatus is set up for chromatography.