State four differences between electrovalent and covalent compounds.

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Solution

Electrovalent Compounds Covalent Compounds

They are formed from the transfer of electrons from one atom to the other. Ex: NaCl They are formed from the sharing of electrons between constituent atoms. Ex: CCl₄

In their molten state, they are good conductors of electricity. They are generally bad conductors of electricity.

They have high melting and boiling point due to the strong electrostatic force of attraction. They have low melting and boiling points.

They are generally soluble in water and insoluble in organic solvents. They are generally soluble in organic solvents and insoluble in water.

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Difference Between electrovalent and covalent bonds

Define: (a) an electrovalent compound (b) a covalent compound.

Explain the following :

(a) Electrovalent compounds conduct electricity in molten or aqueous state.

(b) Electrovalent compounds have a high melting point and boiling point while covalent compounds have low melting and boiling points.

(d) Atoms combine by transfer and sharing of electrons (s).

(e) An element has atoms with different mass number.

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Electrovalent Compounds	Covalent Compounds
They are formed from the transfer of electrons from one atom to the other. Ex: NaCl	They are formed from the sharing of electrons between constituent atoms. Ex: CCl₄
In their molten state, they are good conductors of electricity.	They are generally bad conductors of electricity.
They have high melting and boiling point due to the strong electrostatic force of attraction.	They have low melting and boiling points.
They are generally soluble in water and insoluble in organic solvents.	They are generally soluble in organic solvents and insoluble in water.