JEE Main 2016 Chemistry question

What will happen when a block of copper metal is dropped into a beaker containing a solution of 1 M ?

(1)The copper metal will dissolve with evolution of oxygen gas.
(2)The copper metal will dissolve with evolution of hydrogen gas.
(3)No reaction will occur.Correct
(4)The copper metal will dissolve and zinc metal will be deposited.

Answer: (3)

Solution

For copper to displace zinc from solution, copper would have to be the better reducing agent — that is, it would have to lie *above* zinc in the electrochemical series. In fact the reverse is true: V while V, so the cell

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Question ID VK-115539