1. Tardigrade
  2. Question
  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 :-

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

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 :-

NTA AbhyasNTA Abhyas 2020

Solution:

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