Question

Identify the incorrect statement

1) At room temperature, KCl has NaCl type structure
2) At high pressure the structure of KCI changes to CsCl type structure
3)High pressure increases the co-ordination number
4) At temperature about 760 K, NaCl structure changes to CsCl type structure​

Answer 1

(2) At high pressure the structure of KCI changes to CsCl type structure ia the incorrect statement

Explanation:

1.Increase in pressure increases the coordination number and increase in temperature lowers the coordination number.

2.coordination number, also called Ligancy, the number of atoms, ions, or molecules that a central atom or ion holds as its nearest neighbours in a complex or coordination compound or in a crystal.

3.For example, tetra carbonyl nickel Ni(CO)4 has a coordination number of 4 as 4 CO ligands are attached to Ni atom.

5,A major application of coordination compounds is their use as catalysts, which serve to alter the rate of chemical reactions.

6. Certain complex metal catalysts, for example, play a key role in the production of polyethylene and polypropylene.