A standard galvanic cell is constructed in which a Ni2+ | Ni half cell acts as t

ID: 1015554 • Letter: A

Question

A standard galvanic cell is constructed in which a Ni2+ | Ni half cell acts as the cathode. Which of the following statements are correct?

Hint: Refer to a table of standard reduction potentials.

(Choose all that apply.)

1) As the cell runs, anions will migrate from the other compartment to the Ni2+|Ni compartment.

2) Ni2+ is reduced at the cathode.

3) The anode compartment could be Br2|Br-.

4) The cathode reaction is Ni -> Ni2+ + 2e-.

5) In the external circuit, electrons flow from the other compartment to the Ni2+|Ni compartment.

1) this statement is false

reason = anions will migrate from Ni compartment to other

2) this statement is true

reason = standard galvanic cell , in the cathodic compartment there is reduction takes place .

3) this statement is false

reason = anode compartment can never be Br2 [Br-] because its standard reduction potential value is greater

(more +ve) then NI2+/Ni

4) this statement is false

reason = this rxn is for oxidising rxn , the correct rxn will be NI2+ + 2e- ---> Ni

5) this statement is true

reason = as the ions moves from cathodic compartment to anodic compartment via salt bridge

so the e- moves from anodic compartment to catodic to maintane e- neutrality .

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