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Which of the following are not compounds?
(a) Chlorine gas
(b) Potassium chloride
(c) Iron
(d) Iron sulphide
(e) Aluminium
(f) Iodine
(g) Carbon
(h) Carbon monoxide
(i) Sulphur powder

Answers (1)

Solution:

Elements – pure substance which cannot be broken down in simpler substance.
Chlorine, Iron, Aluminium, Iodine, Carbon and Sulphur Powder

Compounds – They are also pure, but can be broken down in constituents.
Potassium Chloride (KCl)
Iron Sulphide (FeS)
Carbon monoxide (CO)

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