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Question

The formula of a metal oxide is M2O3. If the metal forms its chloride, what will the formula of that compound be?

A
M2Cl
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B
MCl2
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C
M3Cl
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D
MCl3
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Solution

The correct option is D MCl3
We know the valency of oxygen is 2, so from the formula M2O3, we get to know the valency of M is 3.

Valency of chlorine is 1.
So, for chloride of M:
Symbol:MClValency:31

The formula will be MCl3.

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