Coordination Compounds Question 1
Question 1 - 24 January - Shift 1
The primary and secondary valencies of cobalt
respectively in $[Co(NH_3)_5 Cl] Cl_2$ are :
(1) 3 and 5
(2) 2 and 6
(3) 2 and 8
(4) 3 and 6
Show Answer
Answer: (4)
Solution:
Formula: Primary and secondary valency
$[Co(NH_3)_5 Cl] Cl_2$
Oxidation number of $Co$ is +3 .
So primary valency is 3 .
It is an octahedral complex so secondary valency 6 or Co-ordination number 6.
