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  • Solve this problem Choose the correct option , with regards to mercury cell :a) Zinc is oxidized to form zinc oxideb) Sodium hydroxide is used as an electrolytec) mercury oxide is used as the cathodd) conductor like graphite is used in the cell

Choose the correct option , with regards to mercury cell : 

a) Zinc is oxidized to form zinc oxide 

b) Sodium hydroxide is used as an electrolyte

c) mercury oxide is used as the cathod 

d) conductor like graphite is used in the cell   

  • Option 1)

    a,b,c,d

  • Option 2)

    b,c,d

  • Option 3)

    a,b,d

  • Option 4)

    a,b

 

Answers (1)

best_answer

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

 

 Graphite is used as cathod . All other are correct 

Graphite is used to prevent collection of mercury into large droplets 

 


Option 1)

a,b,c,d

Option 2)

b,c,d

Option 3)

a,b,d

Option 4)

a,b

Posted by

prateek

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