Dilute hydrochloric acid reacts with sodium sulphate. (Identify the gas evolved and give chemical test in each of the following cases:)
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When dilute hydrochloric acid reacts with sodium sulphite, sulphur dioxide gas is evolved. ... When the evolved sulphur dioxide gas is passed through potassium dichromate solution, the colour of the solution changes from orange to green. It confirms that the evolved gas is sulphur dioxide.
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(i) When dilute hydrochloric acid reacts with sodium sulphite, sulphur dioxide gas is evolved. ... It confirms that the evolved gas is sulphur dioxide. (ii) When dilute hydrochloric acid reacts with iron (II) sulphide, hydrogen sulphide gas evolves. It is a colourless gas with smell of rotten gas.
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