MCQ
Which pair of elements can from multiple bond with itself and oxygen?
- ✓$F, N$
- B$N, Cl$
- C$N, P$
- D$N, C$

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Above conversion can be achieved by
$(a)$ ${CrO}_{3}$ $(b)$ ${Fe}_{2} {O}_{3}$ $(c)$ ${MnO}_{2}$ $(d)$ ${V}_{2} {O}_{5}$ $(e)$ ${Cu}_{2} {O}$