(A) light blue coloured compound on heating will convert into black (B) which reacts with glucose gives red compound (C) and (A) reacts with ammonium hydroxide in excess in presence of ammonium sulpha

Question

(A) light blue coloured compound on heating will convert into black (B) which reacts with glucose gives red compound (C) and (A) reacts with ammonium hydroxide in excess in presence of ammonium sulphate give blue compound (D). What is (A), (B), (C) and (D) ?

Prashant Kotian · Accepted Answer

Correct answer: D. Cu(OH)2 (light blue A) -Δ-> CuO (black B). CuO + glucose -> Cu2O (red C). Cu(OH)2 + excess NH4OH -> [Cu(NH3)4]SO4 (deep blue D).

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