MCQ
The proper name for ${K_2}{[PtCl_6]}$ is
- APotassium platinum hexachloride
- ✓Potassium hexachloro platinum $ IV$
- CPotassium hexachloro platinate $IV$
- DPotassium hexachloro platinum
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$Pt ( s )\left| H _{2}( g , 1 bar )\right| HCl ( aq \cdot, pH =1)| AgCl ( s )| Ag ( s )$
The $pH$ of aq. HCl required to stop the photoelectric current from $K \left( w _{0}=2.25 eV \right),$ all other conditions remaining the same, is..........$\times 10^{-2}$ (to the nearest integer).
Given, $2.303 \frac{ RT }{ F }=0.06 V ; E _{ AgC1|Ag|C ^{-}}^{0}=0.22\, V$

