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The emf of a Deniell cell Zn | Zn2+ || Cu2+ | Cu can be increased by

A. Decreasing the surface area of the electrodes

B. Increasing the concentration of zinc sulphate solution

C. Increasing the surface area of the electrodes

D. Increasing the concentration of copper sulphate solution

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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