Q. Which ion gives coloured solution ?

3136 252 The d-and f-Block Elements Report Error

A

$C u^{+}$

23%

B

$Z n^{2 +}$

23%

C

$A g^{+}$

11%

D

$F e^{2 +}$

43%

Solution:

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