Q.

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In the above working galvanic cell, a pure copper rod is additionally dipped in the cathodic compartment and connected to zinc rod through separate conducting wire made of same material as earlier used in the circuit, then 

Select the option with correct set of changes from the list (labelled I to V) that occur 
I) Cations flow from salt bridge to anodic compartment.
II) Anions flow from salt bridge to cathodic compartment.
III) Intensity of blue color increases in the cathodic compartment.
IV) Concentration of zinc ions continues to increase in anodic compartment.
V) Direction of electron flow reverses in external circuit but remains same across salt bridge.

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a

IV

b

I, II and III

c

I, II, III and V

d

III, IV and V

answer is D.

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Detailed Solution

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Addition of copper rod does not change direction of current flow.

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In the above working galvanic cell, a pure copper rod is additionally dipped in the cathodic compartment and connected to zinc rod through separate conducting wire made of same material as earlier used in the circuit, then Select the option with correct set of changes from the list (labelled I to V) that occur I) Cations flow from salt bridge to anodic compartment.II) Anions flow from salt bridge to cathodic compartment.III) Intensity of blue color increases in the cathodic compartment.IV) Concentration of zinc ions continues to increase in anodic compartment.V) Direction of electron flow reverses in external circuit but remains same across salt bridge.