What are the oxidation states of phosphorus in the following:
(i)`H_(3)PO_(3)` , (ii)`PCl_(3)` , (iii)`Ca_(3)P_(2)`
(iv)`Na_(3)PO_(4)` , (v)`POF_(3)`

Explanation

To determine the oxidation states of phosphorus in the given compounds, we will follow a systematic approach for each compound.

### Step-by-Step Solution:

1. **For `H₃PO₃`:**
- Let the oxidation state of phosphorus be \( x \).
- The oxidation state of hydrogen (H) is \( +1 \) and that of oxygen (O) is \( -2 \).
- The equation for the compound is:
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