Answers

2016-04-22T10:29:34+05:30
Hydrogen gas will be liberated
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2016-04-22T10:54:27+05:30
If we heat iron filings & sulphur at high temp. then iron sulphide (FeS) will be formed.
When we add HCl thn , 

FeS + 2HCl → FeCl2 + H2S.

Iron chloride will be formed and H₂S will be given off.
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