The potassium ferrocyanide solution gives a Prussian blue colour, when added to :
Show Hint
- \(\mathrm{CoCl_3}\)
- \(\mathrm{FeCl_2}\)
- \(\mathrm{CoCl_2}\)
- \(\mathrm{FeCl_3}\)
The Correct Option is D
Solution and Explanation
\(\mathrm{4FeCl_3 + 3K_4[Fe(CN)_6] \to Fe_4[Fe(CN)_6]_3 + 12KCl}\).
Fe\(^{2+}\) (FeCl\(_2\)) gives only a white/pale precipitate, and cobalt salts do not give this colour.
Answer: (4) \(\mathrm{FeCl_3}\)
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