The table lists the melting points, boiling points and electrical conductivities for six substances D, E, F, G, H and I.
(a)[1]
Which substance is liquid at 25 ^{\circ}C?
(b)[1]
Which substance is a gas at 25 ^{\circ}C?
(c)[3]
Which three substances consist of simple molecules?
(d)[2]
Which substance could be a metal? Give a reason for your answer.
(e)[3]
Which substance has a macromolecular structure? Give two reasons for your answer.
(f)[2]
Which substance is an ionic solid? Give one reason for your answer.
Worked solution & mark scheme
This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: “F is the correct substance.” …
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