Co-Ordination Compounds Question 34
Question: Given the molecular formula of the hexa coordinated complexes A $ CoCl_3.6NH_3 $ B $ CoCl_3.5NH_3 $ C $ CoCl_3.4NH_3 $ . If the number of co-ordinated $ NH_3 $ molecules in A, B and C respectively are 6, 5 and 4, the primary valency in A, B and C are:
[DCE 2003]
Options:
A) 6, 5, 4
B) 3, 2, 1
C) 0, 1, 2
D) 3, 3, 3
Show Answer
Answer:
Correct Answer: B
Solution:
The complexes can be written as follows $ \underset{\text{(A)}}{\mathop{[Co{{(NH_3)}_6}]Cl_3}}\underset{\text{(B)}}{\mathop{[Co{{(NH_3)}_5}Cl]Cl_2}}, $
$ \underset{\text{(C)}}{\mathop{[Co{{(NH_3)}_4}Cl_4]Cl}}, $ Hence, number of primary valencies are 3, 2 and 1 respectively.
