D) Which property of sulphuric acid is shown by the reaction of cone sulphuric acid when heated with.
(i) Nitre
(ii) Carbon

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Solution

Dear Student,
i) Nitre or KNO₃ reacts with Conc. H₂SO₄ forming nitric acid and a precipitate of potassium bisulphate.
$K N O_{3} + H_{2} S O_{4} \to H N O_{3} + K H S O_{4}$
This shows the strong acidic properties of sulphuric acid. It is stronger than Nitric acid and displaces it from its salt solution.

ii) Hot concentrated sulphuric acid acts as an oxidizing agent and reacts with carbon forming carbon dioxide. During the reaction the oxidation number of sulphur changes from +6 to +4
$C + 2 H_{2} S O_{4} \to C O_{2} + 2 S O_{2} + 2 H_{2} O$
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D) Which property of sulphuric acid is shown by the reaction of cone sulphuric acid when heated with. (i) Nitre (ii) Carbon

D) Which property of sulphuric acid is shown by the reaction of cone sulphuric acid when heated with.
(i) Nitre
(ii) Carbon