werner s Theory

Co-ordination compounds have great importance in biological systems. In this context, which statement is incorrect ?

• Carboxypeptidase A is an enzyme and contains zinc

• Haemoglobin is the red pigment of blood and contains iron

• Cyanocobalmin is B-12 and contains cobalt

• Chlorophylls are green pigments in plants and contain calcium

What is the coordination number of this complex?

• 2

• 3

• 4

• 6

primary valency of the central metal atom is

• ionisable

• equal to its coordination number

• directional

• all above are correct

How many chloride ions will be precipitated in the complex ,if coordination number is 6.

 $PtCl_4.3NH_3$  

• 1

• 2

• 3

• 4

coordination compounds satisfy

• primary valencies

• secondary valencies

• both primary and secondary valencies

• none of the above

According to the postulates of Werner theory for coordination compounds

• primary valency is ionizable

• secondary valency is ionizable

• primary and secondary valencies are non ionizable

• only primary valency is nonionizable

Ligands and central metal ions are respectively

• lewis base and lewis acid

• lewis acid and lewis base

• both lewis base

• bothlewis acid

consider the following statements:

According to werners theory

1. ligands are connected to the metal ions by covalent bonds.
2. secondary valencies have directional properties.
3. secondary valencies are nonionizable.

• 1,2 and 3 are correct

• 2 and 3 are correct

• 1 and 3 are correct

• 1 and 2 are correct

 $\left[Pt\left(NH_3\right)_6\right]Cl_4$  

What is primary valency of element in the coordination compound?

• 4

• 3

• 5

• 6

 $\left[Cr\left(NH_3\right)_6\right]^{+3}$  

Based on werner's coordination theory what is the geometry of the complex?

• square planner

• octahedral

• trigonal

• tetrahedral