Ncert Exercises & Solutions

Match the solutions given in Column I with the colours given in Column II.

Column I - (Aqueous solution of salt)	Column II - (Colour)
A. FeSO₄ .7H₂O	1. Green
B. NiCl₂. 4H₂O	2. Light pink
C. MnCl₂.4H₂O	3. Blue
D. CoCl₂. 6H₂O	4. Pale green
	5. Pink

Codes

HINT:

{MnCl}_{2}

.

4 H_{2} O

is light pink colour.

Explanation:

The d block complex shows colour because of the d-d transition.

Hence, option fourth is the correct answer.