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Iron powder and sulphur powder were...

Iron powder and sulphur powder were mixed together were mixed together and divided into two parts A and B. when part A was heated strongly over a burner , then a substance C was formed , the part B was however , not heated at all .when dilute hydrochoric acid was added to substance C , then gas D was ecolved and when dilute hydrochloric acid was added to part B them gas E was evolved .
(a) what type of substance is B ?
(b) what type of substance is c?
(c ) Name the gas (i ) D, and (ii) E
(d) state one charactcristic property fo gas D.
(e ) Write one test to identify gas E.

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