Question

what is reduction reaction
what is reduction reaction

Answer 1

When there is addition of hydrogen and loss of oxygen, it is said to be reduced.
Example:

ZnO + C = Zn +CO

Here Zinc lost the oxygen atom therefore copper is reduced.

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Answer 2

HERE IS UR ANSWER DEAR

In simple word Reduction is chemical reaction which includes the gaining of electrons by one of the atoms involved in the reaction.
The term can define as the element that accepts electrons, as the oxidation state of the element that gains electrons is lowered. ...
one of example is, the iron is oxidized and the oxygen is reduced.