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Arrange the Following in the Increasing Order of Property Mentioned - Chemistry

Arrange the following in the increasing order of property mentioned :

H3PO3, H3PO4, H3PO2 (Reducing character)

 

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Solution

(a) Reducing character: H3PO4 < H3PO3 < H3PO2

This trend can be explained on the basis of structures of oxyacids of phosphorus.

The higher the number of P−H bond, the higher the reducing power of the oxyacid of phosphorus. There are two P−H bonds in H3PO2, one P−H bond in H3PO3 and no P−H bond in H3PO4. So, this explains the reducing trend of the given oxyacids of phosphorus.

 

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