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Question

Chemistry Question on d -and f -Block Elements

Which of the following gives blood red colour with KCNS ?

A

Cu2+Cu^{2+}

B

Fe3+Fe^{3+}

C

Al3+Al^{3+}

D

Zn2+Zn^{2+}

Answer

Fe3+Fe^{3+}

Explanation

Solution

Fe3++3KCNS−>Fe(CNS)3+3K+ { Fe^{3+} + 3KCNS -> Fe(CNS)_3 + 3K^+}