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. 

Select the correct pair of ions having highest $\%$ of polarising power and polarisability nature.

Which of the following order is incorrect ?

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

Select correct orders of the properties given below :

Which of the following order is incorrect about solubility ?

Metal hydrides are ionic, covalent or molecular in nature. Among $\mathrm{LiH},\mathrm{NaH},\mathrm{KH},\mathrm{RbH},\mathrm{CsH}$, the correct order of increasing ionic character is :

According to Fajan's rule, ionic character increases for :

Compound which is maximum soluble in organic solvent is :-

If $\mathrm{NaF}$ is ionic, then $\mathrm{RbF}$ is :-

Polarisation is not a cause of colour/colour intensity in which of the following set of species:-

The compound which contain only ionic bond :-

Select the order which is correct?