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Urea reacts with water to form A which w...

Urea reacts with water to form A which will decompose to form B. B when passed through `Cu^(2+)`(aq), deep blue color solution C is formed. What is the formula of C from the following?

A

`CuSO_4`

B

`[Cu(NH_3)_4]^(2+)`

C

`Cu(OH)_2`

D

`CuCO_3Cu(OH)_2`

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The correct Answer is:
B
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