Advertisements
Advertisements
Question
Which of the following techniques is used for the purification of solid organic compounds?
- Crystallization
- Distillation
Solution
- An impure inorganic component is dissolved in a solvent to create a saturated solution, which is used to purify solid organic molecules. The solvent is heated to a high degree. The insoluble contaminants are then removed from this solution by filtering it out. After that, the solid is filtered out and allowed to dry.
- The process of separation of substances from a solution based on their boiling points is called distillation. Since many organic compounds have similar or close boiling points, they can’t be separated using distillation.
Crystallization is used for purification of solid organic compounds.
APPEARS IN
RELATED QUESTIONS
What type of mixtures is separated by the technique of crystallization?
Give a brief description of the principle of the following technique taking an example.
Crystallisation
Describe the method, which can be used to separate two compounds with different solubilities in a solvent S.
Describe how crystals of copper sulphate are prepared.
Large crystals of pure substances can be obtained from their solutions by the process of ______.
Match the following :
Column I | Column II | ||
1. | Folding of paper | a. | Crystallization |
2. | Oxidation | b. | Can be reserved |
3. | Zinc coating | c. | Cut apples |
4. | Solid in pure form | d. | Galvanisation |
What are crystals?
Benzoic acid is a organic compound. Its crude sample can be purified by crystallisation from hot water. What characteristic differences in the properties of benzoic acid and the impurity make this process of purification suitable?
Prepare crystals of alum.