Question

Concentrated sulphuric acid is :

This question has multiple correct options
A

efforescent

B

hygroscopic

C

oxidizing agent

D

sulphonating agent

Medium

Solution

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Correct options are B) , C) and D)

(A) Efflorescence means spontaneous loss of water by a hydrated salt.
Conc. sulphuric acid is not efforescent. Thus, the option A is incorrect.
(B) Conc. sulphuric acid has strong affinity for water and is hygroscopic. It readily absorbs moisture. Hence, the option B is correct.
(C) Conc. sulphuric acid is strong oxidizing agent as it gives oxygen on strong heating. It oxidizes non-metals, metals above hydrogen in electrochemical series and several compounds. Hence, the option C is correct.
(D) Conc. sulphuric acid is sulphonating agent. It introduces sulphonic acid group into aromatic nucleus. Hence, option D is correct.

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