- Amercury tetrathiocyanatocobaltate $(II)$
- Bmercury cobalttetrasulphocyano $(II)$
- Cmercury tetrasulphocyanidecobalt $(II)$
- Dtetrasulphocyantocobalt mercurate $(II)$
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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, $2.303 \frac{ RT }{ F }=0.06 V ; E _{ AgC1|Ag|C ^{-}}^{0}=0.22\, V$
How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom ?
$(A)$ The $M ^{3+} / M ^{2+}$ reduction potential for iron is greater than manganese
$(B)$ The higher oxidation states of first row $d$ block elements get stabilized by oxide ion.
$(C)$ Aqueous solution of $Cr ^{2+}$ can liberate hydrogen from dilute acid.
$(D)$ Magnetic moment of $V ^{2+}$ is observed between $4.4-5.2\,BM$
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