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  • Answer please! - Redox Reaction and Electrochemistry - JEE Main-3

Choose the correct option  in the context of mercury cell : 

 a) Ag O+KOH is used as an electrolyte 

b) Zn is used as  an electrolyte 

c) Zn O+KOH is used as  an electrolyte

  • Option 1)

    a,b.c

  • Option 2)

    a,b

  • Option 3)

    b,c

  • Option 4)

    b 

 

Answers (1)

As we have learned

Mercury Cell -

Anode - Zn - Hg amalgam cathode - paste of (HgO + C)

- wherein

Electrolyte moist paste of KOH - ZnO cathode reaction HgO(s)+H_{2}O(l)+2e^{-}\rightarrow Hg(l)+2OH^{-}

Anode reaction Zn(Hg)+2\overline{O}H(aq)\rightarrow ZnO(s)+H_{2}(l)+2e^{-}

Cell potential 1.35V

 

 HgO+ KOH   in the moist form is used as an electrolyte and zinc is used as an anode 

 

 

 

 

 


Option 1)

a,b.c

Option 2)

a,b

Option 3)

b,c

Option 4)

b 

Posted by

subam

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