FeS2.

Question

Upon heating,a mixture of iron and sulphur gives a block substance.Which of the following statements concerning the black substance are correct?

(1) It is insoluble in water
(2) It can be attracted by bar magnet
(3) It reacts with dilute hydrchloric acid to give a gas with pungent smell.

Just explain (2)and(3)
All sulphide ore can react with acid?

Answer 1

2) FeS is not attracted by magnet.

3) Yes. All sulphides, when reacting with acid, yields pungent gas H2S

[S]2- + 2H+ ==> H2S (g)