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Valency and Oxidation State

What is the o...

Question

What is the oxidation state of calcium in calcium carbonate ( $C a {C O}_{3}$ )?

A

6

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B

5

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C

4

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D

1

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E

2

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Solution

The correct option is E 2
The oxidation state of calcium in calcium carbonate $C a C O_{3}$ is +2.
Let, $X$ be the oxidation state of $C a$ .
$X + 4 + 3 (- 2) = 0 X + 4 - 6 = 0 X - 2 = 0 X = + 2$

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