What happens during an oxidation reduction reaction

Electrons are transferred between substances

Class 9 Chemistry · Chapter 9 · Test 6

Halogen Redox Reactions

24 MCQs covering oxidation reduction oxidising agents reducing agents halogen displacement reactions electron loss electron gain and the relative oxidising power of halogens.

MCQs

24 questions · 20 min · 24 marks

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Sample questions

The first 5 of 24. Try each one, then tap to see the answer.

Question 1
What is oxidation
- ALoss of an electron
- BGain of an electron
- CGain of a proton
- DLoss of a neutron
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Answer: A
Oxidation is defined as a process in which an electron is lost.
Question 2
What is reduction
- ALoss of an electron
- BGain of an electron
- CLoss of a proton
- DGain of a neutron
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Answer: B
Reduction is defined as a process in which an electron is gained.
Question 3
What is a substance called when it loses an electron
- AReducing agent
- BOxidising agent
- CCatalyst
- DNeutral substance
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Answer: A
A substance that loses an electron is called a reducing agent.
Question 4
What is a substance called when it accepts an electron
- AReducing agent
- BOxidising agent
- CCatalyst
- DMetal
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Answer: B
A substance that accepts an electron is called an oxidising agent.
Question 5
What happens during an oxidation reduction reaction
- AElectrons are transferred between substances
- BNo electrons are involved
- COnly protons are transferred
- DOnly neutrons are transferred
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Answer: A
Oxidation and reduction occur simultaneously because electron loss requires a substance to accept the electron.

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