What is the meaning of Vital Force Theory -Organic Chemistry Notes

Topics covered:

1.What is the meaning of Vital Force theory ?

2. Vital Force theory was proposed by

3. Vital Force theory was rejected by

4. Organic compounds definition and examples

5. Inorganic compounds definition and examples

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Fundamental Principles of Organic Chemistry

Vital Force Theory

 Berzelius gave vital force theory in 1809.

Main Postulates of Vital Force Theory:

According to ‘Vital Force Theory’

  1. Organic compounds are prepared only inside the bodies of living organisms by a supernatural force called a vital force.
  2. It is impossible to synthesize organic compounds in the laboratory.

Simply:

 Organic compounds obtained from living organisms (plants & animals)

e.g

Sugar (plant source)

Urea (animal source)

Organic Compounds & Inorganic Compounds on the basis of Vital Force Theory:

Organic Compounds :

The word “organic” means Life.

Organic compounds obtained from living organisms (plants & animals)

Examples of Organic Compounds :

Sugar (plant source)

Urea (animal source)

Inorganic Compounds :

The word “Inorganic” means Lifeless.

Inorganic compounds obtained from a mineral source

Examples of Inorganic Compounds :

table salt   

marble

CO2

Rejection of Vital Force theory:

In 1828, Friedrich Wohler (a German chemist) rejected the vital force theory.

He prepared Urea (an organic compound) in a laboratory by heating Ammonium cyanate (an inorganic compound).

It proved the vital force theory to be wrong. 

Preparation of First Organic Compound in Laboratory:

Urea was the first organic compound which was prepared in the laboratory. Therefore, the vital force theory is discarded.

Recommended video:

Vital Force Theory ( in Urdu / Hind )

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