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ICSE Class 10 Chemistry Question 17 of 63

Study of Compounds — Nitric Acid — Question 13

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Question

Question 8

Give two chemical equations for each of the following:

(a) Reactions of nitric acid with non-metals.

(b) Nitric acid showing as acidic character.

(c) Nitric acid acting as oxidising agent.

Answer

(a) Action on non-metals:

C + 4HNO3 ⟶ CO2 + 2H2O + 4NO2

S + 6HNO3 ⟶ H2SO4 + 2H2O + 6NO2

(b) Reaction with alkalis:

K2O + 2HNO3 ⟶ 2KNO3 + H2O

CuO + 2HNO3 ⟶ Cu(NO3)2 + H2O

(c) Nitric acid acting as oxidising agent:

C + 4HNO3 ⟶ CO2 + 2H2O + 4NO2

3Cu + 8HNO3 [cold and dil.] ⟶ 3Cu(NO3)2 + 4H2O + 2NO