Question

Methods used for purification of organic compounds are based on :

• A. neither on nature of compound nor on the impurity present.
• B. nature of compound only.
• C. nature of compound and presence of impurity.
• D. presence of impurity only.

Answer 1

The Correct Option is C

The selection of organic compound purification methods is dictated by the compound's intrinsic properties and the nature of any contaminants. Both elements are critical in determining the appropriate technique. The following details elucidate the influence of each factor:

1. Compound Characteristics:
   • Organic compounds exhibit diverse physical attributes including boiling point, solubility, and volatility. Knowledge of these properties is fundamental to choosing a suitable purification strategy.
   • For instance, distillation is appropriate for volatile compounds. Non-volatile solids at ambient temperatures may be purified via recrystallization.
2. Impurity Profile:
   • The classification and characteristics of impurities also guide the selection of purification methods. Impurities can vary in volatility, solubility, and other properties.
   • As an example, if an impurity is non-volatile and leaves a residue, simple distillation can effectively isolate a volatile organic component.

Consequently, the most effective purification strategy integrates an understanding of both the compound's nature and the presence of impurities. The definitive determinant for purification methods is, therefore:

The methods for purifying organic compounds are determined by the compound's nature and the presence of impurities.