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  • Which of the following salt will evolve sulphur dioxide gas along with the formation of yellowish turbidity when treated with dilute H2SO4?

Which of the following salt will evolve sulphur dioxide gas along with the formation of yellowish turbidity when treated with dilute H2SO4?

Option: 1

Sodium sulphate


Option: 2

Sodium sulphite


Option: 3

Sodium sulphide


Option: 4

Sodium thiosulphate


Answers (1)

best_answer

As we have learnt,

Na2S2O3 is decomposed by H2SO4, giving S and SO2. The reaction occurs as follows:

\mathrm{Na_{2}S_{2}O_{3}\: +\: H_{2}SO_{4}\: \rightarrow \: Na_{2}SO_{4}\: +\: S\: +\: SO_{2}\: +\: H_{2}O}

Therefore, Option(4) is correct.

Posted by

Shailly goel

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