Question

H3po4 h3po3 h3po2 reducing character arrange in increasing order

Answer 1

Acid strength can be explained by the oxidation number of the central atom. The central atom here is Phosphorous (P).

H3PO4: +5

H3PO3: +3

H3PO2: +1

Hence, the order of reducing character is H3PO4>H3PO3>H3PO2

Answer 2

oxidation is opposite of nature so first let conclude it's oxidising tendency and then reverse the order to get reducing tendency.

$H3PO4 - it \: can \: give \: 3 \: {oh}^{ - }$
H3PO3- It can give 2 OH ion

H3PO2-It can give 1 OH ION

Oxidation tendency order-

H3Po4>H3PO3>H3PO2

so, reducing order be

H3PO2>H3PO3>H3PO4.