- A$3$
- B$4$
- C$5$
- ✓$6$
$\mathop {{C_6}{H_5} - \mathop {\mathop C\limits^{||} }\limits^O - C{H_2} - \mathop {\mathop C\limits^{||} }\limits^O - C{H_3}}\limits_{{\rm{(Keto form)}}} \,$and
$\mathop {{C_6}{H_5} - \mathop {\mathop C\limits_{||} }\limits_O - CH = \mathop {\mathop {C\,\,\,}\limits_{|\,\,\,\,} }\limits_{OH} - C{H_3}}\limits_{{\rm{(enol form)}}} $
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| $LIST-I$ | $LIST-II$ |
| $(I)$ $\left[ Cr ( CN )_6\right]^{4-}$ | $(P)$ $t_{2 g }$ orbitals contain 4 electrons |
| $(II)$ $\left[ RuCl _6\right]^{2-}$ | $(Q)$ $\mu$ (spin-only) $=4.9 BM$ |
| $(III)$ $\left[ Cr \left( H _2 O \right)_6\right]^{2+}$ | $(R)$ low spin complex ion |
| $(IV)$ $\left[ Fe \left( H _2 O \right)_6\right]^{2+}$ | $(S)$ metal ion in $4$+ oxidation state |
| $(T)$ $d^4$ species |
[Given : Atomic number of $Cr =24, Ru =44, Fe =26$ ] Metal each metal species in $LIST-I$ with their properties in $LIST-II$, and choose the correct option
${H_2}O + {H_2}PO^-_4 \rightleftharpoons {H_3}{O^ + } + HPO_4^{ - 2}$
Select out the group of acidic species lying on the right side of the equilibrium

$(i)$ $Zn|Zn^{2+}\,(1\,M)||Cu^{2+}\,(1\,M)|Cu$
$(ii)$ $Zn|Zn^{2+}\,(0.1\,M)||Cu^{2+}\,(1\,M)|Cu$
$(iii)$ $Zn|Zn^{2+}\,(1\,M)||Cu^{2+}\,(0.1\,M)|Cu$
$(iv)$ $Zn|Zn^{2+}(0.1\,M)||Cu^{2+}\,(0.1\,M)|Cu$