Home
Class 11
CHEMISTRY
Benzoic acid is an organic compound. Its...

Benzoic acid is an 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 ?

Text Solution

Verified by Experts

Benzoic acid can be purified from hot water because of the following characteristics.
(i) Benzoic acid is more soluble in hot water and less soluble in cold water.
(ii) Impurities associated with benzoic acid are either insoluble in water or are more soluble in water to such an extent that when a hot saturated solution of benzoic acid is cooled, the impurities remain in the solution.
Since, impure benoic acid satisfies both these conditions, therefore, benzoic acid can be purified by crystallization.
Promotional Banner

Topper's Solved these Questions

  • ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES TECHNIQUES

    PRADEEP|Exercise Additional Questions (Very short Answer Questions)|41 Videos

  • ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES TECHNIQUES

    PRADEEP|Exercise Additional Questions (Short Answer Questions)|53 Videos

  • ORGANIC CHEMISTRY-SOME BASIC PRINCIPLES TECHNIQUES

    PRADEEP|Exercise NCERT EXEMPLAR PROBLEMS WITH ANSWERS, HINTS AND SOLUTIONS (Assertion and Reason Type Questions)|6 Videos

  • HYDROGEN

    PRADEEP|Exercise COMPETITION FOCUS (Assertion-Reason Type Questions) Type 2|15 Videos

  • P-BLOCK ELEMENTS (NITROGEN FAMILY)

    PRADEEP|Exercise Competition focus jee(main and advanced)/ medical entrance special) (VIII. Assertion-Reason Type Questions)|10 Videos

Similar Questions

Explore conceptually related problems

Rubber is a naturally occurring polymer, which is a linear polymer of isoprene. It can be easily deformed but regains its original shape after the stress is relieved. The properties of natural rubber can be modified and improved by process of vulcanization. It is mixed with 3 to 5% sulphur and heated at 373-423 K. This forms cross links through disulphide bonds (-S-S-) , which make rubber hard, tough with greater tensile strength. There are many different formulations of synthetic rubbers. These are copolymers in which one of the monomer is isoprene. Some common examples are neoprene rubber, Buna-S, Buna-N, etc. What does the letter 'N' stands for in synthetic rubber Buna-N.

Rubber is a naturally occurring polymer, which is a linear polymer of isoprene. It can be easily deformed but regains its original shape after the stress is relieved. The properties of natural rubber can be modified and improved by process of vulcanization. It is mixed with 3 to 5% sulphur and heated at 373-423 K. This forms cross links through disulphide bonds (-S-S-) , which make rubber hard, tough with greater tensile strength. There are many different formulations of synthetic rubbers. These are copolymers in which one of the monomer is isoprene. Some common examples are neoprene rubber, Buna-S, Buna-N, etc. What is the structure and IUPAC name of monomers of natural rubber?

Plot a graph showing the variation of current density (J) versus the electric field ( E ) For two conductors of different materials. What information from this plot regarding the properties of the conducting material, can be obtained which can be used to select suitable materials for use in making (i ) standard resistance and (ii) connecting wires in electric circuit?

Assertion (A) Naphthalene, anthracene, benzoic acid, camphor and other such substances which sublime can be purified from other substances by sublimation. Reason (R ) There are certain substances which decompose when sublimed under ordinary pressure.