This question is about halogens and halogen compounds.

1. (a)A drop of bromine liquid was placed in a sealed glass jar. After a time, the colour of the bromine had spread throughout the jar. Explain this observation in terms of the kinetic particle theory.[3]
2. (b)(i)Chlorine, bromine and iodine are halogens. State the trend in the colour of the halogens from chlorine to iodine.[1]
3. (b)(ii)State the physical state of chlorine and iodine at room temperature and pressure. chlorine iodine[1]
4. (b)(iii)Chlorine is used to make other chemicals. State one other use of chlorine.[1]
5. (c)The molecular structure of a compound of iodine and chlorine is shown. Cl Cl Cl I I Cl Cl Deduce the molecular formula of this compound.[1]
6. (d)Fluorine reacts with aqueous sodium hydroxide to produce sodium fluoride, NaF, water and oxygen. 2F₂ + 4NaOH → 4NaF + 2H₂O + O₂ Calculate the maximum volume of oxygen produced, in dm³, at room temperature and pressure, when 0.037 mol of sodium hydroxide react completely with fluorine. Give your answer to two significant figures. volume of oxygen ................................................ dm³[2]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.