Question

For a given anion, greater the polarising power of the cation, more the ionic character.
A. True
B. False

Answer 1

Hint: Try to recall that polarisation is basically distortion of electron clouds of an anion when a cation approaches it. Also, it is known that polarisation is directly proportional to the size of anion and is inversely proportional to size of cation. Now by using this you can easily answer.

Complete step by step solution:
It is known to you that when a cation approaches an anion, the electron cloud of the anion is attracted towards the cation and hence gets distorted. This effect is called the polarisation of anion.
The power of cation to polarise the anion is called its polarising power and the tendency of anion to get polarized is called its polarisability.
It is also known that polarisation is directly proportional to the polarising power of cation and polarisability of anion.
The greater is the polarisation produced, more is the neutralization of the charges (i.e. Charge of cation by the electron cloud of the anion) and hence the ionic character decreases or covalent character increases. So, we can say that ionic character is inversely proportional to polarisation produced in a covalent compound.
Since, polarisation is inversely proportional to ionic character and is directly proportional to the polarising power of cation. Hence, from this we can say that for given anion greater the polarising power of cation, lesser will be the ionic character.
Therefore, from above we can conclude that the given statement is False or Option B is the correct option.

Note: It should be remembered that polarising power of a cation is inversely proportional to its size whereas polarisability of an anion is directly proportional to its size.