Question

What is the criteria of purity of organic compound?

Answer 1

Purity check criteria:

Sharp melting point.

Sharp boiling point.

Density, etc.

Answer 2

Answer:

• i. A chemically pure compound' has characteristic physical properties such as crystalline for refractive index, specific gravity, density, sharp melting and boiling point etc.
• ii. The magnitude of these properties change depending upon the nature and the amount of impurities present
• iii. Presence of impurities lowers the melting point of solids and increases the boiling point of liquid.
• iv. Thus, melting point of a solid and boiling point of a liquid are important criteria of purity.