Sulphuric acid acts as an acid, an oxidising agent and as a dehydrating agent. In which way does it behave when it acts on Sulphur?

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Solution

A redox reaction takes place between sulfur and sulfuric acid, forming sulphur dioxide and water. Sulphur is oxidised to sulphur dioxide by hot and concentrated sulphuric acid, and the acid also gets reduced to the same product (sulphur oxide) by sulphur. So $H_{2} S O_{4}$ is reduced. Hence sulphuric acid as as an $O x i d i s i n g$ agent.

$S$ + $2 H_{2} S O_{4}$ $\to$ $2 H_{2} O$ + $3 S O_{2}$

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Similar questions

Describe the reactions that show
(i) Concentrated sulphuric acid is a non-volatile acid.
(ii) Concentrated sulphuric acid acts as a dehydrating agent.
(iii) Concentrated sulphuric acid is an oxidising agent.
(iv) Dilute sulphuric acid behaves as dibasic acid.

(a) Name the process used for the large scale manufacture of sulphuric acid.
(b) Which property of sulphuric acid accounts for its use as a dehydrating agent?
(c) Concentrated sulphuric acid is both an oxidising agent and a non-volatile acid. Write one equation each to illustrate the properties of sulphuric acid mentioned above.

(a) Which property of sulphuric acid accounts for its use as a dehydrating agent ?

(b) Concentrated sulphuric acid is both an oxidizing agent and a non-volatile acid. Write on equation each to illustrate the above mentioned properties of sulphuric acid.

Q. Sulphuric acid acts as dehydrating agent in its reaction with:

Conc. sulphuric acid acts as an oxidising agent when it undergoes :

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