Reactions of the halogens
3 marks · EasyThe properties of the halogens are shown in the list below.
Name the halogen that is a pale green gas at room temperature.
State the colour of solid iodine.
Describe the electrical conductivity of the halogens at room temperature.
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(a) Chlorine
(b) Grey-black
(c) They are poor conductors of electricity.
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Marking points
B1 (a) · 1 mark · Names chlorine as the pale green gas.
B1 (b) · 1 mark · States 'grey-black' for iodine's colour.
B1 (c) · 1 mark · Correctly states halogens are poor conductors of electricity.
Worked solution
a) Chlorine is a pale green gas at room temperature.
b) Solid iodine is grey-black in colour.
c) The halogens are poor conductors of electricity.