Q.

When electrons are transferred from Zn to Cu2+ in copper sulphate solution, the energy (heat) is

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a

absorbed

b

evolved

c

not used in the reaction

d

None of these

answer is B.

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Detailed Solution

If zinc rod is dipped in copper sulphate solution, then due to transfer of electrons from zinc to copper ion, heat is evolved.
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When electrons are transferred from Zn to Cu2+ in copper sulphate solution, the energy (heat) is