MCQ
On adding excess of ammonium hydroxide to a copper chloride solution.
- ✓A deep blue solution is obtained
- BNo change is observed
- CBlue precipitate of copper hydroxide is obtained
- DBlack precipitate of copper oxide is obtained
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$Cr_2O_7^{2-}$ ( $aq$ $1\,M$ ) $+ 14H^+(aq) + 6e^-$ $\rightarrow 2Cr^{+3} (aq,\,1\,M) + 7H_2O (l)$