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chemistry igcse acapprinted 142 · PDF 142
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Aitchison College Academic Resources.
3
2 ‘The table shows the melting points, boiling points and electrical conductivities of six substances, D,
E.F.G, Hand I.
bet melting point | boiling point | conducts electricity | conducts electricity
ic rc when solid when liquid
D 1083 2567 yes yes
E -117 793 no no
F 3550 4827 no no
G 119 445 no no
H -210 -196 no no
I 801 1413 no yes
(a) Identify the substance, D, E, F, G, H or I, which is:
(i) aliquid at 25°C [1]
{ii) agas at 25°C [1]
(iii) a solid consisting of simple molecules at 25°C. [1]
(b) Identify the substance, D, E, F, G, H or I, which is a metal. Give a reason for your choice.
substance
(2)
(c) Identify the substance, D, E, F, G, H or I, which has a macromolecular structure. Give two
reasons for your choice.
[3]
(d) Identify the substance, D, E, F, G, H or I, which is an ionic solid. Give a reason for your choice.
substance
[Total: 10]
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