Identify the pair of elements which show variable valency.

Al, Fe

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Pb, Sn

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Sn, Al

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Pb, Mg

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Solution

The correct option is C Pb, Sn
Lead $(P b)$ and tin( $S n$ ) show variable valencies of $+ 2$ and $+ 4$ .

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Similar questions

Arrange the following elements in the order of their abundance in Earth's crust:

Aluminium - $A l$ , Silicon - $S i$ , Oxygen - $O$ , Iron - $F e$ .

What is variable valency ? Give two examples of elements showing variable valency.

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