Which phenomenon does not occur in Daniell cell?Select the proper choice from the given multiple choices.
(A) Increase in weight of plate of Cu.
(B) The conduction of electricity takes place by salt bridge.
(C) Increase in weight of plate of Zn.
(D) There is no change in colour of ZnSO₄ solution.
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Answer:
The options (C) is not correct.
Explanation:
In a Daniell cell, zinc rods are dipped into a solution of copper sulphate which is in turn connected to a copper rod dipped into a solution of copper sulphate.
The transformations observed are:
The zinc rod gets corroded gradually and its mass reduces, however the concentration of Zn2+ increases and its mass increases.
Additionally, the blue colour of the copper sulphate solution disappears and becomes colourless.
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