Q.

The property of self-linkage among identical atoms to form long chain compounds is known as:

1 Catenation  
2 Isomerisation  
3 Superposition  
4 Halogenation  

Ans.

(1)

Catenation is the property of self-linking of an element by which an atom combines with the other atoms of the same element to form long chains. This property is exhibited by carbon as it forms covalent bonds with other carbon atoms to form longer chains and structures. This is the reason for the presence of the vast number of organic compounds in nature.