MCQ
The element which forms oxides in all oxidation states $ + I$ to $ + V$ is
- ✓$N$
- B$P$
- C$As$
- D$Sb$
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$\xrightarrow{{Mg/THF}}A\mathop {\xrightarrow{{(i)\,C{H_3}CHO}}}\limits_{(ii)\,aq.N{H_4}Cl} B$

$ 3 \mathrm{ROH}+\mathrm{PCl}_3 \rightarrow 3 \mathrm{RCl}+\mathrm{A} $
$ \mathrm{ROH}+\mathrm{PCl}_5 \rightarrow \mathrm{RCl}+\mathrm{HCl}+\mathrm{B}$