Which of the following is not a redox reaction?
$left parenthesis straight i right parenthesis space Na space plus space straight H subscript 2 straight O space space rightwards arrow space space space NaOH space plus space 1 half straight H subscript 2 left parenthesis ii right parenthesis space CaCO subscript 3 space space rightwards arrow space space space CaO space plus space CO subscript 2$

Solution

Reduction (ii) is not a redox reaction. Since in the given reaction, no element undergoes a change in oxidation state.
+ 2 + 4 -2 + 2 -2 +4 -2
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Redox Reactions

Some More Questions From Redox Reactions Chapter

What is reduction (electronic concept)?

What is reducing agent (electronic concept)?

What is an oxidising agent (electronic concept)?

Can oxidation occur without reduction?

What are redox reactions?

What are direct redox reactions? Give one example.

What are indirect redox reactions?

Write formulas for the following compounds:
(a) Mercury (II) chloride
(b) Nickel (II) sulphate
(c) Tin (IV) oxide
(d) Thallium (I) sulphate
(e) Iron (III) sulphate
(f) Chromium (III) oxide

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