(a) Characteristics of organic compounds : 

1. These are made up of only a few elements C, H, O, N, S,X(Cl, Br,l) 2. These involve covalent bonds. 

3. These are generally gases or liquids 

4. They have low melting and boiling points. 

5. They are combustible. 

6. They show molecular reations. 

7. They show isomerism. 

8. These are non-conductors of electrocity. 

9. There are generally insoluble in water but soluble in organic solvents.

Characteristics of inorganic compounds : 

1. These are made up of all the known elements. 

2. These involve ionic bonds. 

3. These are generally solids. 

4. They have high melting and boiling points. 

5. They are non-combustible. 

6. They show ionic reactions. 

7. They don’t show isomerism. 

8. These are generally good conductors of electricity. 

9. These are generally soluble in water but insoluble in organic solvents.

(b) Classification of Organic Compounds Aliphatic – Open Chain Compounds

                          Hydrocarboos