Question

define isomerism ???????

Answer 1

the compound having the different structural formulae but same molecular formula are called isomers and phenomenon is known as isomerism

Answer 2

⭕️Isomerism is shown by chemical compounds, due to which two or more compounds with similar molecular formula occur but they'll have different physical and chemical properties. 

✔️✔️1. Structural isomerism 

Compounds have same molecular formula but different structures or different arrangement of atoms within the molecule.

✔️✔️2.stereo isomerism

molecules have same atomic structures but different arrangements in the space.

⭕️Structural isomerism is further classified into six types:➖➖⭕️

⏹ Chain/Nuclear Isomerism:

⭕️compounds have same molecular formula but different arrangement of carbon chain within the molecule.  

⏹ Position Isomerism: 

⭕️isomers have same formula but differ in the position of double or triple bond or functional groups. 

⏹ Functional Isomerism : 

⭕️isomers have same molecular formula but different functional groups .

⏹ Metamerism: 

⭕️isomers having same molecular formula but different no. of carbon atoms on either side of functional groups.

 ⏹ Tautomerism : 

⭕️same molecular isomers exist in dynamic equilibrium with each other.

 ⏹ Ring –Chain Isomerism: 

⭕️same molecular formula but open structure or ring structures.