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Q.

Regarding Fajans rules, which of the following is/are INCORRECT?

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a

Higher polarization of a bond decreases the lattice energy and melting point of the compound

b

Higher charges on both ions promote electrovalency

c

A small positive ion  and large negative ion favours covalent bond formation

d

Ionic character of the bond is directly proportional to the extent of polarization of anion.

answer is B, C.

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Detailed Solution

Fajans Rules : covalent nature  extent of polarization. Small cations, large anions, ions with higher charges cause greater polarization.
Covalent nature  extent of polarization.
 

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