Question

In which of the following compounds are correctly arranged in the increasing order of their covalent character?

• A. \(\mathrm{SiCl_4<AlCl_3<NaCl<MgCl_2}\)
• B. \(\mathrm{NaCl<MgCl_2<AlCl_3<SiCl_4}\)
• C. \(\mathrm{NaCl<MgCl_2<SiCl_4<AlCl_3}\)
• D. \(\mathrm{SiCl_4<AlCl_3<MgCl_2<NaCl}\)

Hint:

According to Fajan's rule, \[ \boxed{\text{Higher charge and smaller cation} \Rightarrow \text{greater covalent character}.} \] Thus, \[ \boxed{\mathrm{NaCl<MgCl_2<AlCl_3<SiCl_4}.} \]

Answer 1

The Correct Option is B