Chemistry · Oct / Nov 2016 · Paper 11 · Question 4

The graph gives the melting points (m.p.) of mixtures of lead and tin. [graph: melting point / °C vs % tin in the mixture, with axes 0–400 °C and 0–100 % tin, showing m.p. of pure lead and m.p. of pure tin] The graph shows that any mixture of lead and tin must have a melting point that is

1. Aabove that of tin.
2. Bbelow that of lead.
3. Cbelow that of both tin and lead.
4. Dbetween that of tin and lead.

As printed in the paper