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Redox Reactions - SS1 Chemistry Past Questions and Answers - page 1

1

Oxidation is the process that involves:

 

A

Gain of electrons

 

B

Loss of electrons

 

C

Formation of covalent bonds

 

D

Increase in temperature

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2

Reduction is the process that involves:

 

A

Gain of electrons

 

B

Loss of electrons

 

C

Formation of ionic bonds

 

D

Decrease in temperature

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3

In a redox reaction, the species that undergoes oxidation is called:

 

A

Oxidising agent

 

B

Reducing agent

 

C

Catalyst

 

D

None of the above

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4

In a redox reaction, the species that undergoes reduction is called:

 

A

Oxidising agent

 

B

Reducing agent

 

C

Catalyst

 

D

None of the above

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5

The oxidising agent is responsible for:

 

A

Gaining electrons

 

B

Losing electrons

 

C

Providing a medium for the reaction

 

D

Both gaining and losing electrons

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6

Which of the following statements is true about oxidation and reduction?

 

A

Oxidation and reduction always occur together.

 

B

Oxidation and reduction can occur independently.

 

C

Oxidation always involves a gain of electrons.

 

D

Reduction always involves a loss of electrons.

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7

Which of the following is an example of oxidation?

 

A

Conversion of water into hydrogen and oxygen gas

 

B

Rusting of iron

 

C

Formation of table salt from sodium and chlorine

 

D

Photosynthesis in plants

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8

Which of the following is an example of reduction?

 

A

Conversion of water into hydrogen and oxygen gas

 

B

Rusting of iron

 

C

Formation of table salt from sodium and chlorine

 

D

Photosynthesis in plants

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9

In a redox reaction, the electrons are transferred from the:

 

A

Oxidising agent to the reducing agent

 

B

Reducing agent to the oxidising agent

 

C

Catalyst to the reactants

 

D

None of the above

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10

Define oxidation and reduction and explain their significance in chemical reactions. Provide examples to illustrate these processes.

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