Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
\[{{K}_{4}}[Fe{{(CN)}_{6}}]\] is used for the detection of (1)\[Z{{n}^{2+}}\]ions (2)\[C{{u}^{2+}}\]ions (3) \[F{{e}^{3+}}\]ions (4)\[F{{e}^{2+}}\]ionsA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: A
Solution :
\[{{K}_{4}}[Fe{{(CN)}_{6}}]\]or pottasium Ferro cyanide gives dark blue colour with\[F{{e}^{3+}}\]ions, white ppt. with\[Z{{n}^{2+}}\]ions and reddish brown ppt. with\[C{{u}^{2+}}\]ions.
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