Home Courses Contact About

1. ⇒ (MHT CET 2023 11th May Evening Shift )

Which from following cations in their respective oxidation states develops colourless aqueous solution?

A. ${Fe}^{3 +}$

B. ${Fe}^{2 +}$

C. ${Cu}^{2 +}$

D. ${Cu}^{+}$

Correct Option is (D)

Ion	Outer electronic configuration	No. of unpaired electrons
${Fe}^{3 +}$	$3 d^{5}$	$5$
${Fe}^{2 +}$	$3 d^{6}$	$4$
${Cu}^{2 +}$	$3 d^{9}$	$1$
${Cu}^{+}$	$3 d^{10}$	$0$

Cu $^{+}$ is colourless because of the absence of unpaired electrons.

⇒Transition and Inner Transition Elements