Select the correct answer.

which chemical equation represents a redox reaction?

a. mg(clo3)2 + 2hci — mgcl2 + 2hcio3

b. co + h2o → h2 + co2

oc. 2nh4no3 + cucl2 → 2nh4cl + cu(no3)2

od. na2so3 + febr2 — 2nabr + feso3

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B. CO + H₂O → H₂ + CO₂

Explanation:

Redox reaction -

It is the type of reaction , where the process of oxidation and reduction takes place simultaneously , is known as a redox reaction .

Oxidation refers to the addition of oxygen atom or the removal of hydrogen atom .

And ,

Reduction refers to the addition of hydrogen atom or the removal of the oxygen atom .

From the options given in the question , the only reaction , which have both the process of oxidation as well as reduction , is  -

CO + H₂O → H₂ + CO₂

In the above reaction ,

Oxidation process -  CO → CO₂ ,

The addition of oxygen atom .

Reduction process - H₂O → H₂ ,

The removal of oxygen atom .

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