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Question: Which of the following is in order of increasing covalent character ?...

Which of the following is in order of increasing covalent character ?

A

CCl4<BeCl2<BCl3<LiClCCl_{4} < BeCl_{2} < BCl_{3} < LiCl

B

LiCl<CCl4<BeCl2<BCl3LiCl < CCl_{4} < BeCl_{2} < BCl_{3}

C

LiCl<BeCl2<BCl3<CCl4LiCl < BeCl_{2} < BCl_{3} < CCl_{4}

D

LiCl<BeCl2<CCl4<BCl3LiCl < BeCl_{2} < CCl_{4} < BCl_{3}

Answer

LiCl<BeCl2<BCl3<CCl4LiCl < BeCl_{2} < BCl_{3} < CCl_{4}

Explanation

Solution

As charge on cations increases, their polarising power increases and thus covalent character increases.

LiCl+<BeCl22+<BCl33+<C4+Cl4\stackrel { + } { \mathrm { LiCl } } < \stackrel { 2 + } { \mathrm { BeCl } _ { 2 } } < \stackrel { 3 + } { \mathrm { BCl } _ { 3 } } < \stackrel { 4 + } { \mathrm { C } } \mathrm { Cl } _ { 4 }