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ICSE Class 10 Chemistry Question 14 of 23

Solved 2025 Specimen Paper ICSE Class 10 Chemistry — Question 2

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Question

Question 3(ii)

What property of Sulphuric acid is exhibited in each of the following cases:

(a) In the preparation of HCl gas when it reacts with Sodium chloride.

(b) When concentrated Sulphuric acid reacts with Copper to produce Sulphur dioxide gas.

Answer

(a) Non-volatile nature
Reason — Concentrated sulphuric acid has a high boiling point (338°C) and so it is considered to be a non-volatile acid. It is, therefore, used for preparing volatile acids like HCl.

(b) Oxidising property
Reason — The oxidising property of concentrated sulphuric acid is due to the fact that on thermal decomposition, it yields nascent oxygen which oxidises metals.