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 hydrochloric acid was added to substance C , then gas D was evolved 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 characteristic property fo gas D.
(e ) Write one test to identify gas E.

Answer

(a) Mixture (fe+s)(b) compound (iron sulphite FeS) ( c) (i) Hydrogen sulphite `H_(2)S` (ii) Hydrogen `H_(2)` ( d) smell of rotten eggs ( e) burus with a pop sound