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Chapter 1: Q9P (page 2)

Which of the following has

  1. The most polar bond?
  2. The least polar bond?
  3. NaI, LiBr, Cl2, KCI

Short Answer

Expert verified
  1. KCI is most polar.
  2. CI2is least polar.

Step by step solution

01

Defining bond polarity

The distribution of positive and negative electrical charges over a bond is known as bond polarity. The bond polarity can be determined by comparing the difference in electronegativity between the atoms. The more the difference in electronegativity, the more polar is the bond.

02

Finding the least and most polar molecule.

Here,KCI is the most polar molecule as it has the highest electronegativity difference of 2.34.

The electronegativity difference between NaI and LiBr is lesser as chlorine is more electronegative than bromine and iodine.

As CI2 molecule has the zero difference in electronegativity between the two atoms, therefore, it is non-polar.

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