Question

1) Choose the correct statement from the options below.

A) Polar covalent bonds are made of two identical atoms which have electronegativities that are equal
B) Polar covalent bonds are made up of two identical atoms which have electronegativities that are unequal
C)Polar covalent bonds are made of two different atoms which have electronegativities that are equal
D) Polar covalent bonds are made up of two different atoms which electronegativities that are unequal

2) Choose the correct statement from the options below.
A) Nonpolar bonds are made from two identical atoms which have electronegativities that are equal
B) Nonpolar bonds are made from two identical atoms which have electronegativities that are unequal
C) Nonpolar bonds are made from two different atoms which have electronegativities that are equal
D) Nonpolar bonds are made from two different atoms which have electronegativities that are unequal

Answer 1

Number (1), the answer is D

Number (2), the answer is A

Answer 2

For 1: The correct answer is Option D.

For 2: The correct answer is Option A.

Step-by-step explanation:

• For 1:

Polar molecules are defined as the of molecules, in which two atoms that combine must be of different element and therefore can create a dipole. For a dipole, there must be a difference in electronegativity and that is achieved when two atoms of different electronegativity combine. The negative dipole or charge is created on the electronegative atom and positive dipole or charge is created on the electropositive atom.

Thus, the correct answer is option D.

• For 2:

Non-polar molecules are defined as the molecules which are formed when two atoms of same element combine, so that a dipole cannot be created. When there is no dipole, there will be no difference in electronegativity and this is achieved when two atoms of same electronegativities combine.

Thus, the correct answer is A.