which among the following formation is not an example of covalent bond. (1)CF4 (2) HF (3) NH3 (4) LiF
Answers
Answer:
Lithium Fluoride (LiF) is not an example of covalent bond. It is an ionic compound.
Explanation:
Lithium fluoride, an inorganic compound has the chemical formula LiF. It is most widely used as a flux in the production of ceramics, such as enamels, glasses and glazes. It is also used in welding and brazing fluxes and molten salt chemistry in metallurgy.
LIF, is a salt which is formed from the neutralization of the strong base lithium hydroxide with weak acid hydrofluoric acid, HF.
The correct answer will be option 4.
A covalent bond is formed by sharing of electrons while an ionic bond is formed by gaining and losing electrons.
1)In CF₄, the bond is formed by sharing 4 electrons of carbon with 1 electron of each fluorine atom.
2)In HF, hydrogen, and fluorine share their 1 electron each to complete duplet and octet.
3)In NH₃, 3 valence electrons of nitrogen are shared with 1 electron each of hydrogen.
4)In LiF, Li loses its 1 electron. The electron lost by Li is gained by fluorine to form the ionic bond.