D-And F-Block Elements Ques 116
Question: Which pair of compound is expected to show similar colour in aqueous medium
[IIT Screening 2005]
Options:
A) $ FeCl_2 $ and $ CuCl_2 $
B) $ VOCl_2,\text{and }CuCl_2 $
C) $ VOCl_2\text{ and }FeCl_2 $
D) $ FeCl_2\text{ and }MnCl_2 $
Show Answer
Answer:
Correct Answer: B
Solution:
Colour of transition metal ion salt is due to $ d-d $ transition of unpaired electrons of d-orbital. Metal ion salt having similar number of similar number of unpaired electron in d-orbitals shows similar colour in aqueous medium Number of unpaired electrons = 1
