MCQ
The oxidation number of $P$ in $\mathrm{Na}_4 \mathrm{P}_2 \mathrm{O}_7$ is :
- A$+3$
- B$+2$
- ✓$+5$
- D$−3$
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$A$ (predominantly) is
| List-$I$ (Molecule) | List-$II$(Shape) |
| $A$ $\mathrm{NH}_3$ | $I$ Square pyramid |
| $B$ $\mathrm{BrF}_5$ | $II$ Tetrahedral |
| $C$ $\mathrm{PCl}_5$ | $III$ Trigonal pyramidal |
| $D$ $\mathrm{CH}_4$ | $IV$ Trigonal bipyramidal |
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