MCQ
Which anion can undergo both oxidation and reduction?
  • A
    $Cr_2O_7^{2-}$
  • B
    $NO_3^-$
  • C
    $OCl^-$
  • $S^{2-}$

Answer

Correct option: D.
$S^{2-}$
d
All are oxyacid of chlorine

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

If $A$ to $E$ are element of a group from top to bottom then group can be
The coordination numbers of $Co$ and $Al$ in $[Co(Cl)(en)_2]Cl$ and $K_3[Al(C_2O_4)_3]$, respectively, are (en $=$ ethane $-1,2-$ diamine)
For diatomic molecules, the correct statement($s$) about the molecular orbitals formed by the overlap to two $2 p_z$ orbitals is(are)

$(A)$ $\sigma$ orbital has a total of two nodal planes.

$(B)$ $\sigma^*$ orbital has one node in the $x z$-plane containing the molecular axis.

$(C)$ $\pi$ orbital has one node in the plane which is perpendicular to the molecular axis and goes through the center of the molecule.

$(D)$ $\pi^*$ orbital has one node in the $x y$-plane containing the molecular axis.

All element in $3$$^{rd}$ period have
For $1^{st}$ law of thermodynamics, select the correct option.
Among $B _2 H _6, B _3 N _3 H _6, N _2 O , N _2 O _4, H _2 S _2 O _3$ and $H _2 S _2 O _8$, the total number of molecules containing covalent bond between two atoms of the same kind is. . . .
Fructose and glucose can be distinguished by
$5\,mole$ of $A$, $6\, moles$ of $B$ and excess amount of $C$ are mixed to produce a final product $D$, according to the reaction 
$A + 2B \to I$
$I + C \to B + D$
What is the maximum moles of $D$ can be produced assuming that the products formed can also be reused in the reactions ? .............. $\mathrm{moles}$
If $O _{2}$ gas is bubbled through water at $303 \;K$, the number of millimoles of $O _{2}$ gas that dissolve in 1 litre of water is (Nearest Integer) (Given : Henry's Law constant for $O _{2}$ at $303 \;K$ is $46.82 \;k$ bar and partial pressure of $O _{2}=0.920 \;bar$ ) (Assume solubility of $O _{2}$ in water is too small, nearly negligible)
In the reaction
$8 Al + 3Fe_3O_4 \to 4Al_2O_3 + 9 Fe$
the number of moles of electrons transfered by $1\,mol$ of reductant