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Solution


Q.

Read the passage carefully and answer the following questions from (i) to (v):

An ionic compound is a chemical compound in which ions of elements are held together by ionic bonds. In this type of bond, two oppositely charged ions are held strongly through electrostatic forces. Metals have loosely bound electrons in their valence shell whereas non-metals need electrons for octet completion and to attain noble gas configuration. The metal thus completely loses an electron and the non-metal accepts it. By this transfer of electrons, the atoms remain no longer neutral. Cations and anions are formed respectively. Usually, ionic compounds are solids and found in the form of crystals. They have high melting and boiling points.

 

(v) Identify the incorrect statement.
1 Ionic compounds are usually brittle.  
2 Sharing of electrons is involved in ionic bonds.  
3 Common salt is an ionic compound.  
4 Ions are fundamental units of ionic compounds.  

Ans.

(2)