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Solution


Q.

What is true about covalent compounds They:
1 have high melting and boiling point.  
2 are mostly soluble in water.  
3 are formed between atoms of metals and non-metals.  
4 are formed by the sharing of electrons in the bonding atoms.  

Ans.

(4)

Covalent compounds are held together by weak intermolecular forces which fails to hold the compound bind tightly. Thus, a small amount of heat energy is capable of breaking these weak intermolecular forces, therefore, the melting and boiling points of covalent compounds is low. Covalent compounds are non-polar in nature which means they do not dissolve in water, instead make a separate layer on the water’s surface. Hence, covalent bonds are insoluble in water. Covalent compounds are formed by the sharing of electron in the bonding atoms between two non-metals.