Which of the following property is not shown by covalent compounds?
Insoluble in water
Poor conductors of electricity
Exist as crystalline solids
Low boiling and melting points
The covalent molecules move about freely and tend to exist as gases or liquids or soft liquids at room temperature.
Explain the following: (a) Covalent compounds are generally gases or liquids or soft solids. (b) Covalent compounds have low melting point and boiling point. (c) Non-polar covalent compounds are insoluble in water. (d) Polar covalent compounds are good conductors of electricity.
Question 10 Which one of the following properties is not generally exhibited by ionic compounds? (a) Solubility in water. (b) Electrical conductivity in solid state. (c) High melting and boiling points. (d) Electrical conductivity in molten state.
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.
(c) Atoms combine by transfer and sharing of electrons (s).