Q. 6.66 - An Introduction to General, Organic, and Biological Chemistry

Question

Which electronegativity difference (a, b, or c) would you expect for a polar covalent bond?

(a) $0.0$ to $0.4$

(b) $0.5$ to $1.8$

(c) $1.9$ to $3.3$

Step-by-Step Solution

Answer

Option (b), $0.5$ to $1.8$ is correct option.

Step 1: Given Information

We are given three options with different electronegativity. we need to find which will form polar covalent bond.

(a) from $0.0$ to $0.4$

(b) from $0.5$ to $1.8$

(c) from $1.9$ to $3.3$

Step 2: Explanation

When electronegativity difference is between $0.0$ to $0.4$ , the electrons are  considered to be shared equally leading to formation of non polar covalent bond. As electronegativity difference increases shared electrons are more attracted towards electronegative atom which increases polarity.

So electronegativity difference between $0.5$ to $1.8$ leads to formation of polar covalent bond.

Option (b) satisfies condition for formation of polar covalent bond. 

Hence, option (b) is correct option.