Which of the following does not define reduction?

Gain of electron and addition of hydrogen

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Removal of oxygen

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Decrease in oxidation state

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Removal of electron , removal of hydrogen , addition of oxygen and increase in oxidation state

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Solution

The correct option is D Removal of electron , removal of hydrogen , addition of oxygen and increase in oxidation state
Oxidation is Removal of electron , removal of hydrogen , addition of oxygen and increase in oxidation state
Reduction is Gain of electron and addition of hydrogen, Removal of oxygen, Decrease in oxidation state.

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Fill in the following blanks with suitable words :

(a) The addition of oxygen to a substance is called ........... whereas removal of oxygen is called .......

(b) The addition of hydrogen to a substance is called .......... whereas removal of hydrogen is called .........

If force of repulsion increases then which of the following becomes easier?

1. removal of electron

2. addition of electron

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