Which of the following dinegative anions is quite common?

  • A
    $S^{2-}$
  • B
    $Se^{2-}$
  • C
    $Te^{2-}$
  • D
    $O^{2-}$

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Similar Questions

How many total statements are correct in the following?
$(i)$ $SO_2$ - antichlor,preservative
$(ii)$ $O_3$ - Disinfectant
$(iii)$ $Cl_2$ - Antiseptic
$(iv)$ $O_2$ - used in oxy-acetylene welding
$(v)$ $PH_3$ - used in smoke screens
$(vi)$ $HNO_3$ - Pickling of stainless steel

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Why are the elements of group $16$,excluding polonium,called chalcogens?

Assertion $(A)$: Both rhombic and monoclinic sulphur have $S_8$ molecules.
Reason $(R)$: They have planar structure.
The correct option among the following is:

How many isotopes of dioxygen are there? Name them.

When Conc. $H_2SO_4$ is added to charcoal :-

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