MCQ
The oxidation number of P in Na4P2O7 is:
- A+3
- B+2
- C+5
- D−3
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(Given : Energy of the electron in the first shell of the hydrogen atom is $-2.2 \times 10^{-18} \,J$; $h =6.63 \times 10^{-34}\, Js$ and $c =3 \times 10^{8} \,ms ^{-1}$ )
