During electrolysis of molten NaCl, the product at anode is: MCQ with Answer and Explanation

During electrolysis of molten NaCl, the product at anode is:
A. Chlorine
B. Oxygen
C. Hydrogen
D. Sodium
Answer: Option A
Solution (By JKExamLibrary)
At anode (oxidation): 2Cl⁻ → Cl₂ + 2e⁻ (chlorine gas). At cathode (reduction): Na⁺ + e⁻ → Na (liquid sodium). In aqueous NaCl, due to water, cathode produces H₂ and anode Cl₂ (or O₂ depending on concentration).

Discuss this Question (0)

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

Practice More chemistry Questions

Question #1
The compound formed by transfer of electrons from a metal to a non-metal is:
A. KBr
B. CO₂
C. Cl₂
D. H₂O

Correct Answer: Option A


Explanation:
KBr is ionic; potassium (metal) transfers one electron to bromine (non-metal) forming K⁺ and Br⁻. CO₂ and H₂O are covalent (sharing). Cl₂ is covalent (nonpolar).

This question belongs to: Science chemistry
Question #2
Beta particles are:
A. Positively charged protons
B. Neutrons
C. High energy electrons
D. Helium nuclei

Correct Answer: Option C


Explanation:
Beta particles are high-energy, high-speed electrons (β⁻) or positrons (β⁺) emitted from a radioactive nucleus during beta decay. In β⁻ decay, a neutron converts to a proton, emitting an electron and an antineutrino. Beta particles have moderate penetrating power; they can be stopped by a few millimeters of aluminum. They cause less ionization than alpha.

This question belongs to: Science chemistry
Question #3
Sulphuric acid is produced by Contact process. The raw materials are:
A. S or FeS₂, air, water
B. NH₃, air, water
C. NaCl, H₂O
D. CaCO₃, HCl

Correct Answer: Option A


Explanation:
Contact process: Sulfur or pyrite (FeS₂) is burned in air to form SO₂, then SO₂ is oxidized with O₂ over V₂O₅ catalyst to SO₃, which is absorbed in concentrated H₂SO₄ to produce oleum, then diluted to get H₂SO₄. Raw materials: sulfur (or pyrite), air, and water (for dilution). Not NaCl or NH₃.

This question belongs to: Science chemistry