Question

Among Lici, BeCl2, BCl3 and CC14, the covalent bond character follows the order -
A) LiCl> BeCl2>BC13>CC14
Beči,<B<13<CC14
C) LiCl> BeCl2>BC14>CC13
D) LiCl< BeCl2<BC13<CC14​

Answer 1

Answer:-

Given compounds are LiCl , BeCl₂ , BCl₃ and CCl₄.

Before arranging the following compounds according to covalent bond character, we must know what Covalent bond is.

Covalent bond : The mutual sharing of electrons between two or more elements (mostly non metals) is called a Covalent bond.

We know that, The ability of an element to involve in the formation of a Covalent bond in the periodic table increases from left to right across a period.

So, the metals will have the least tendency of forming a Covalent bond.

Among the given compounds, LiCl has less covalent character as it is the first element in the 2nd period.

BeCl₂ is the next (second) element of the same period.

So, BeCl₂ has more covalent character when compared with lithium.

Now, Among Boron and carbon , carbon has highest tendency of forming a Covalent bond because Boron is in 13th group and Carbon is in 14th group.

While comparing with BCl₃ and BeCl₂ , BCl₃ has higher tendency to form a Covalent bond as it is next to Beryllium.

So, the correct order of covalent bond character will be :

LiCl < BCl₃ < BeCl₂ < CCl₄.

Answer 2

Explanation:

• Size of cation deceases ↓
• Covalent character increases ↑

Hence, covalent character increases from

LiCl < BeCl₂ < BCl₃ < CCl₄