MCQ
$IUPAC$ name for $K\left[ {Ag{{\left( {CN} \right)}_2}} \right]$ is
- APotassium argentocyanide
- BPotassium silver cyanide
- ✓Potassium dicyanoargentate $ (I)$
- DPotassium dicyanosilver $(II)$
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(Rounded-off to the nearest integer) $\left[ K _{ b }=0.52 \,K \,kg\, mol ^{-1}\right]$

Assertion $A$: Permanganate titrations are not performed in presence of hydrochloric acid.
Reason $R$ : Chlorine is formed as a consequence of oxidation of hydrochloric acid.
In the light of the above statements, choose the correct answer from the options given below.
$\mathrm{M}\left|\mathrm{M}^{2+}\right||\mathrm{X}| \mathrm{X}^{2-}$
If $\mathrm{E}_{\left(\mathrm{M}^{2+} / \mathrm{M}\right)}^0=0.46 \mathrm{~V}$ and $\mathrm{E}_{\left(\mathrm{x} / \mathrm{X}^{2-}\right)}^0=0.34 \mathrm{~V}$.
Which of the following is correct?