In an electrolytic cell, oxidation occurs at the: MCQ with Answer and Explanation

In an electrolytic cell, oxidation occurs at the:
A. Electrolyte
B. Cathode
C. Salt bridge
D. Anode
Answer: Option D
Solution (By JKSSB Mock Tests)
In any electrochemical cell, the anode is defined as the electrode where oxidation (loss of electrons) takes place, and the cathode is where reduction (gain of electrons) occurs. In an electrolytic cell, the anode is positively charged, attracting anions which then lose electrons.

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Practice More chemistry Questions

Question #1
The valency of aluminium in AlCl₃ is:
A. 4
B. 2
C. 1
D. 3

Correct Answer: Option D


Explanation:
In AlCl₃, aluminium combines with three chlorine atoms. Chlorine has a valency of 1 (needs one electron to complete its octet). By the criss-cross method, Al has valency 3 because it loses three electrons to achieve a stable octet (Al³⁺). Thus, the formula is AlCl₃. Aluminium's electronic configuration is 2,8,3, so it loses three valence electrons. Exam tip: Valency equals the number of electrons lost, gained, or shared to complete octet.

This question belongs to: Science chemistry
Question #2
Plaster of Paris should be stored in a moisture-proof container because:
A. It reacts with moisture to form a hard solid (gypsum)
B. It dissolves in water
C. It sublimes
D. It evaporates

Correct Answer: Option A


Explanation:
CaSO₄·½H₂O readily absorbs moisture to set to CaSO₄·2H₂O (gypsum), becoming hard and useless for molding. So it must be kept dry. Reaction: CaSO₄·½H₂O + 1½H₂O → CaSO₄·2H₂O.

This question belongs to: Science chemistry
Question #3
Sulphuric acid is called 'king of chemicals' because:
A. It is the strongest acid
B. It is found in nature
C. It is the cheapest acid
D. It is used in the manufacture of many other chemicals

Correct Answer: Option D


Explanation:
H₂SO₄ is used in production of fertilizers, detergents, dyes, explosives, petroleum refining, and many other chemicals. Its wide industrial use earns it the title. It's not the strongest (e.g., HClO₄ is stronger).

This question belongs to: Science chemistry