1. Tardigrade
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  3. Chemistry
  4. An aqueous solution containing one mole per litre each of Cu((NO)3)2,(AgNO)3,(Hg)2((NO)3)2 and Mg((NO)3)2 is being electrolysed using inert electrodes. The values of standard reduction potentials are: E° Ag+ / Ag=+0.80V EHg2+ 2 / Hg=+0.79V E° Cu+ 2 / Cu=+0.34V E° Mg+ 2 / Mg=-2.37V on continuous electrolysis, the sequence of deposition of metals on the cathode will be :-

Q. An aqueous solution containing one mole per litre each of $Cu\left(\left(NO\right)_{3}\right)_{2},\left(AgNO\right)_{3},\left(Hg\right)_{2}\left(\left(NO\right)_{3}\right)_{2}$ and $Mg\left(\left(NO\right)_{3}\right)_{2}$ is being electrolysed using inert electrodes. The values of standard reduction potentials are :
$E^\circ _{Ag^{+} / Ag}=+0.80V & E_{Hg_{2}^{+ 2} / Hg}=+0.79V \\ E^\circ _{Cu^{+ 2} / Cu}=+0.34V & E^\circ _{Mg^{+ 2} / Mg}=-2.37V$
on continuous electrolysis, the sequence of deposition of metals on the cathode will be :-

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Solution:

$Mg$ metal can not be deposited at cathode from aqueous solution.

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