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Q.

What will occur if a block of copper metal is dropped into a beaker containing a solution of 1M ZnSO4 ?

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a

The copper metal will dissolve and zinc metal will be deposited.

b

The copper metal will dissolve with evolution of hydrogen gas.

c

No reaction will occur.

d

The copper metal will dissolve with evolution of oxygen gas.

answer is B.

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Detailed Solution

Zinc cannot be removed from ZnSO4 by copper.
As a result, nothing will happen.

Notably, Zn2+Zn has a lower standard reduction potential than Cu2+Cu does.

Therefore, Zn is a better reducer than CuZn can therefore remove Cu from copper sulphate solution.

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