Property

Vegetable oils

Minerals oils

1.  Composition

These are triesters of glycerol with higher fatty acids.

These are hydrocarbons (saturated). Kerosene oil-Alkanes from C₁₂ to C₁₆.

2. Source

Seeds root and fruits of plants.

These occur inside earth in the form of petroleum.

3. Hydrolysis

Undergo hydrolysis with alkali. Form soap and glycerol.

No hydrolysis occurs.

4. On adding NaOH and phenolphthalein

Decolourisation of pink colour occurs.

No effect.

5. Burning

Burns slowly

Burn very readily.

6. Hydrogenation

Hydrogenation occurs in presence of nickel catalyst. Solid glycerides (fats) are formed.

No hydrogenation occurs.