A blood red colour is obtained when ferric chloride solution reacts with _________.

K C N

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K S C N

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K_{4} [{F e (C N)}_{6}]

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K_{3} [{F e (C N)}_{6}]

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Solution

The correct option is D $K S C N$
The reaction of ferric chloride with potassium thiocyanate $(K S C N)$ gives a blood-red solution.
$F e C l_{3} + 3 K S C N \to F e (S C N)_{3} b l o o d r e d c o l o u r + 3 K C l$

Option B is correct.

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