Question

Name the gas evolved when dilute hydrochloric acid is added to the following samples and thus identify which of these is a compound.
1) A mixture of iron filing and Sulphur powder.
2) A mixture of iron filin and Sulphur powder which is strongly heated.

Answer 1

1 .. h2 will be released

2 ... h2 and SO3 And SO2 with a pungent smell will be released..

and second is a compound

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