MCQ
Among the following the coloured compound is
- A$\mathrm{CuCl}$
- B$\mathrm{K}_3\left[\mathrm{Cu}(\mathrm{CN})_4\right]$
- ✓$\mathrm{CuF}_2$
- D$\left[\mathrm{Cu}\left(\mathrm{CH}_3 \mathrm{CN}\right)_4\right] \mathrm{BF}_4$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$(i)$ Fehling's Test : Positive
$(ii)$ $Na$ fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not

$(i)\,\, C_6H_5COCl$
The correct decreasing order of their reactivity towards hydrolysis is