Hydrochloric acid is produced by the reaction of NaCl with: MCQ with Answer and Explanation

Question

Share Report Error

Hydrochloric acid is produced by the reaction of NaCl with:

A. Ammonia

B. Concentrated sulphuric acid

C. Nitric acid

D. Sodium hydroxide

Answer: Option B

Solution (By JKSSB Mock Tests)

NaCl + H₂SO₄ (conc.) → NaHSO₄ + HCl↑, at low temperature. At high temperature, NaHSO₄ + NaCl → Na₂SO₄ + HCl. This is the laboratory preparation of HCl gas. Industrial production is by direct combination of H₂ and Cl₂. Nitric acid is an oxidizer and would produce chlorine. Sodium hydroxide gives salt and water (neutralization). Ammonia reacts with acid.

This question belongs to: Science chemistry

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More chemistry Questions

Question #1

Share Report

A gas occupies 2.0 L at 1.0 atm. If pressure is increased to 4.0 atm at constant temperature, the volume will be:

A. 0.5 L

B. 2.0 L

C. 1.0 L

D. 8.0 L

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Boyle's law: P₁V₁ = P₂V₂. Given P₁=1.0 atm, V₁=2.0 L, P₂=4.0 atm. V₂ = (1.0 × 2.0) / 4.0 = 0.5 L. Volume decreases as pressure increases, because gas is compressible. The product PV is constant for a fixed mass of gas at constant T. Scuba divers experience this; as they dive deeper, pressure increases, reducing air volume in lungs.

This question belongs to: Science chemistry

Question #2

Share Report

Which of the following is a natural polymer?

A. PVC

B. Teflon

C. Nylon

D. Starch

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Starch (polysaccharide) is a natural polymer made from glucose units. It is found in plants. Cellulose, proteins, natural rubber are natural polymers. PVC, nylon, Teflon are synthetic polymers. Natural polymers are biodegradable and renewable. Starch is used as food, in paper, and bioplastics. Synthetic polymers are often derived from petrochemicals.

This question belongs to: Science chemistry

Question #3

Share Report

Consider the following statements: 1. A buffer solution resists changes in pH upon adding small amounts of acid or base. 2. A buffer is made of a strong acid and its conjugate base. Which is/are correct?

A. Both 1 and 2

B. 1 only

C. Neither 1 nor 2

D. 2 only

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option B

Explanation:
A buffer solution maintains a relatively constant pH when small amounts of strong acid or base are added. However, it is typically composed of a weak acid and its conjugate base (or a weak base and its conjugate acid). A strong acid completely dissociates and cannot form a buffer system. Thus, only statement 1 is correct.

This question belongs to: Science chemistry

Explore All chemistry MCQs