MCQ
Phosphorus normally exhibits a covalency of:
- ✓$+3$ and $+5$
- B$+2$ and $+3$
- C$+1$ and $+2$
- D$+3$ and $+4$
✓
Answer
Correct option: A.
$+3$ and $+5$
Phosphorous acid $\ce{H_3PO_3},$ metaphosphorous acid $\ce{HPO_2}$ has $+3$ oxidation state.
Pyrophosphoric acid $\ce{H_4P_2O_7}$, orthophosphoric acid $\ce{H_3PO_4}$ has $+5$ oxidation state.
Pyrophosphoric acid $\ce{H_4P_2O_7}$, orthophosphoric acid $\ce{H_3PO_4}$ has $+5$ oxidation state.
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