Question

(d) Identify the gas evolved and give chemical test in each
of the following cases.
Dilute hydrochloric acid reacts with :
(i) Iron (II) sulphide (ii) Sodium sulphite.
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Answer 1

Answer:

iron

Explanation:

when dilute hydrochloric acid Is added to iron fillings, iron(II) chloride and hydrogen gas is produced . In this reaction iron displaces hydrogen from hydrochloric acid to form iron chloride and hydrogen gas , this reaction is a single displacement reaction

Answer 2

Explanation:

(i) Sulphur-di-oxide gas is evolved. Colourless, gas with smell of burning sulphur. It turns acidified potassium dichromate orange to green.

(i) Sulphur-di-oxide gas is evolved. Colourless, gas with smell of burning sulphur. It turns acidified potassium dichromate orange to green.(ii) Hydrogen sulphide gas is evolved. Colourless gas with smell of rotten eggs. It turns lead acetate paper black.

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