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Q.

Copper exhibits +2 oxidation state in aqueous solution to form stable compounds because

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a

Copper gives coloured compound in +2 oxidation state

b

Electronic configuration of copper ion in +2 oxidation state is [Ar]3d94s0

c

Copper is a transition metal in +2 state

d

+2 state compounds of copper shows high hydration compound to +1 

answer is B.

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Detailed Solution

In aqueous solution hydration energy and in solid state lattice energy is favorable for the formation of Cu2+ ion.

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