Which of the following gases is/are released when iron sulphide reacts with hydrochloric acid? [1]
(i) CO2
(ii) H2
(iii) H2S
(1) (i) and (ii) (2) (ii) and (iii)
(3) Only (ii) (4) Only (iii)
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Answer:
H2S
Explanation:
hydrogen sulfide: FeS + 2 HCl → FeCl2 + H2S.
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