Question

Which ion gives coloured solution ?

• A. $Cu^+$
• B. $Zn^{2+}$
• C. $Ag^+$
• D. $Fe^{2+}$

Answer 1

Answer: (D)

$Fe^{2+}$

Answer 2

Only $Fe^{2+}$ ion has unpaired electrons in $d$-orbitals and show $d-d$ transitions