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Question

What is the valency of carbonate ion (CO23)?

A
2
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B
3
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C
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D
1
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Solution

The correct option is A 2
The combining capacity of an element or an ion is known as its valency.

Carbonate ion (CO23) is an example of a polyatomic ion.

So, valency can be found from the overall charge present on it. Carbonate ion contains two negative charges on it. Therefore, its valency is two.

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