Question

Ionic compounds do not conduct electricity in solid state. Identify the correct reason.
A) Absence of oppositely charged ions in solid state
B) Absence of mobile ions in solid state
C) Absence of force of attraction between ions in solid state
D) Absence of free electrons in solid state

Answer 1

Hint: As we know that in chemistry, chemical bonds are three types of classification. This classification is based on electron binding in the bond. There are covalent bonds, ionic bonds and coordinate bonds. The covalent bond is nothing but the mutually sharing of electrons between the two atoms in the molecule. The ionic bond is nothing but highly electronegativity pulls the electrons towards itself, least electronegativity atoms lose the electrons in the molecule. The coordinate bond is nothing but the pair of the electrons from one atom to another atom in the molecule. It is mainly seen in coordination chemistry.

Complete answer:
We need to know that ionic compounds are good conductors. Ionic compounds act as the good thermal and electrical conductors in the molten state of the molecule. But in solid state it does not conduct electricity. Because of the absence of mobile ions in solid state in ionic compounds. In solid state mobile electrons are arrested in nature.
According to the above discussion, we conclude ionic compounds do not conduct electricity in solid state due to the absence of mobile ions in solid state.

Hence, the option B is the correct answer.

Note:
We need to know that the electronegativity difference in the bonded atom plays a vital role whether the bond is ionic or covalent or polar covalent bond. The electronegativity difference between the bonded atom is lesser than \[1.7\], means it consider as covalent bond. If the electronegativity difference between the bonded atom is equal to \[1.7\], means it consider as polar covalent bond. If the electronegativity difference between the bonded atom is greater than \[1.7\], it is considered a polar bond.