Question

what is redox reaction? what down a chemical reaction representing it.

Answer 1

redox reaction is defined as the reduction and oxidation in a chemical equation.
for eg.CuO+H2-->Cu+H2O

Answer 2

$\huge \bf Redox \: reaction :$

In a chemical reaction when both oxidation and reduction takes place simultaneously then it is called Redox reaction.

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$\huge \bf Example :$

$\bf CuO + H_{2} \: ➞ \: Cu + H_{2}O$

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$\bf Here$

$\bf Substance \: oxidised : H_{2}$

$\bf Substance \: reduced : CuO$

$\bf Oxidising \: agent : CuO$

$\bf Reducing \: agent : H_{2}$