Week 8 Term 1 Basic MCQ questions

Chemistry MCQ Quiz

1. What happens when you place a zinc rod in an aqueous copper(II) solution?

A displacement reaction occurs.
No reaction takes place.
Copper is reduced.
Copper ions are oxidized.

Incorrect. The correct answer is highlighted.

2. What is a half reaction in redox chemistry?

A reaction that involves only one element.
A reaction showing gain or loss of electrons.
A reaction with high activation energy.
A reaction that occurs in basic medium.

3. In oxidation, what is typically lost or gained?

Water molecules.
Hydrogen ions.
Electrons are lost.
Oxygen atoms.

4. What is reduction in a redox reaction?

A reaction where electrons are lost.
A reaction where electrons are gained.
A reaction that produces oxygen.
A reaction with no electron transfer.

5. What is an oxidation-reduction reaction in chemistry?

A reaction that doesn't involve electron transfer.
A reaction with only one reactant.
A reaction that produces oxygen gas.
The sum of two half reactions with electron transfer.

6. What is oxidation in a half reaction?

A half reaction in which electrons are lost.
A reaction that produces oxygen gas.
A reaction with no electron transfer.
A half reaction in basic medium.

7. What happens at the cathode in an electrochemical cell?

Reduction occurs.
Oxidation occurs.
No reaction takes place.
Hydrogen gas is produced.

8. Where do electrons flow in an electrochemical cell?

Electrons flow in the wires from the anode to the cathode.
Electrons flow in the wires from the cathode to the anode.
Electrons flow in the salt bridge.
Electrons flow in the aqueous solution.

Chemistry MCQ Quiz