Which of the following combinations in an aqueous medium will give a red colour or precipitate
(... VIDEO
Which of the following combinations in an aqueous medium will give a red colour or precipitate
(A) \( \mathrm{Fe}^{3+}+\mathrm{SCN}^{-} \)
(B) \( \mathrm{Fe}^{2+}+\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-} \)
\( P \)
(C) \( \mathrm{Ni}^{2+}+ \) dimethylglyoxime \( +\mathrm{NH}_{3} \) solution
(D) \( \mathrm{Cu}^{2+}+\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{-4} \)
W
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