Fajan's Rule

${\mathrm{AlCl}}_3$ is an electron deficient compound but ${\mathrm{AlF}}_3$ is not. This is because

Assertion $\left(\mathrm{A}\right):$ Covalent character follows: $\mathrm{NaCl}<{\mathrm{MgCl}}_2<{\mathrm{BeCl}}_2<\mathrm{LiCl}$
Reason $\left(\mathrm{R}\right):$ According to Fajan's rules, covalent character of ionic compounds increases with decrease in size of cation.

Which of the following compounds is polar ?

Which of the alkaline earth metal halides given below is essentially covalent in nature?

The covalent characters of ${\mathrm{CaCl}}_2{\mathrm{BaCl}}_2,{\mathrm{SrCl}}_2$ and ${\mathrm{MgCl}}_2$ follow the order :

The most polarisable ion among the following is.

Choose the correct statement with reference to water and hydrogen peroxide. 

What is the electronic configuration of ${\mathrm{zn}}^{+2}$ ion?

The electronic configuration ${\mathrm{Hg}}^{2+}$is _____.

Polarising action of ${\mathrm{Cd}}^{2+}$on anion is stronger than that of ${\mathrm{Ca}}^{2+}$because

Statement-I. $\mathrm{LiCl}$ is covalent whereas $\mathrm{NaCl}$ is ionic.

Statement-2. Greater the size of the cation, greater is its polarising power.

Incorrect option among the following is :

What is the correct order of decreasing polarisability of the following ions?

${\mathrm{Cl}}^{-}, {\mathrm{Br}}^{-}, {\mathrm{l}}^{-}, {\mathrm{F}}^{-}$

What will be the correct sequence of increasing covalent character ?

Predict the correct order of ionic radius.

Which option represents correct order of increasing covalent character of chlorides?

$\mathrm{ }\mathrm{C}-\mathrm{C}\mathrm{l}$ bond enthalpy is greater than $\mathrm{C}\mathrm{ }–\mathrm{I}$ bond, because:

The sequence of the polarizability of ${\mathrm{I}}^{–},\mathrm{ }\mathrm{B}{\mathrm{r}}^{–},\mathrm{ }\mathrm{C}{\mathrm{l}}^{–}and\mathrm{ }{\mathrm{F}}^{–}$ ions is

The solubility of $\mathrm{CsF}$ is more than $\mathrm{CsI}$. Which of the following factor satisfy this statement?