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ICSE Class 10 Chemistry Question 10 of 63

Study of Compounds — Nitric Acid — Question 15

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15
Question

Question 15

Assertion (A): KNO3 and conc. H2SO4 are the reactants for the preparation of nitric acid.

Reason (R): Conc. H2SO4 being a non volatile acid is required to prepare volatile acids.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
Answer

Both A and R are true and R is the correct explanation of A.

Explanation— In the laboratory preparation of Nitric acid, nitric acid is obtained by distilling the reactants, conc. sulphuric acid (H2SO4) and potassium nitrate (KNO3). Hence, the assertion (A) is true.
Sulphuric acid is a non-volatile acid and produces volatile nitric acid on reacting with potassium nitrate or sodium nitrate. Hence, the reason (R) is true.
Reason (R) explains why conc. sulphuric acid (H2SO4) and potassium nitrate (KNO3) are used as reactants for the preparation of nitric acid. Hence, reason (R) is a correct explanation of assertion (A).