Question

which reactant is oxidised in the following chemical reaction?​

Answer 1

Answer:

In this reaction, hydrogen loses one electron. Hydrogen is oxidized, thus making it the reducing agent. An element that is oxidized is a reducing agent, because the element loses electrons, and an element that is reduced is an oxidizing agent, because the element gains electrons.

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Answer 2

Answer:

Oxidation and reduction can be recognized by the following three rules:

Oxidation

Reduction

1

Gains oxygen atoms

Loses oxygen atoms

2

Loses hydrogen atoms

Gains hydrogen atoms

3

Loses electrons - Increase in oxidation number

Gains electrons - Decrease in oxidation number

The oxidizing agent is another way of identifying the substance that was reduced.

(a) 

In the above reaction  is oxidized because it gains an oxygen atom and  is reduced because it loses oxygen atoms