Chemistry · PYQ NEET UG 2020

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

1. A
   \( [\mathrm{Cu}(\mathrm{NH}_3)_4]^{2+} \)
2. B
   \( \mathrm{Cu}(\mathrm{OH})_2 \)
3. C
   \( \mathrm{CuCO}_3 \cdot \mathrm{Cu}(\mathrm{OH})_2 \)
4. D
   \( \mathrm{CuSO}_4 \)