9.
If the iron fillings and sulphur are heated in the mass ratio of 8:4
(a) a mixture of iron and sulphur is formed
(b) a compound of iron and sulphur is formed
(c) a mixture of iron sulphide and iron is formed
(d) a mixture of iron sulphide and sulphur is formed
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(b) a compound of iron and sulphur is formed
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