$O_2^{2-}$ is the symbol of which ion?

  • A
    Oxide
  • B
    Superoxide
  • C
    Peroxide
  • D
    Monoxide

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Which bond is shorter: $C=O$ or $N=O$? Why?

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Sodium bicarbonate $(NaHCO_3)$ has:

Which of the following compounds will exist?

The formal charges of $N_{(1)}$,$N_{(2)}$ and $O$ atoms in the structure shown below are respectively:
$:N_{(1)}=N_{(2)}=\ddot{O}:$

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