Question

1. The addition of oxygen to a substance is called
whereas removal of oxygen is called​

Answer 1

Explanation:

When Oxygen is added, to a substance, it is said to be, oxidised. When Oxygen is removed, from a substance, it is said to be, reduced. Oxidation and reduction are very common, chemical reactions. These reactions are called redox reactions.

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Answer 2

Answer:

1.The addition of oxygen to a substance is called Oxidation

2.The removal of oxygen from a substance is called reduction.

Explanation:

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