In crystallization if the solvent is inflammable then direct heating is________________?

Related Mcqs:

1. Crystallization does not involve_______________?

   A. heating
   B. sublimation
   C. cooling
   D. vaporization

2. The use of CaCl2 and PCl5 in the process of crystallization is as a____________________?

   A. oxidizing agent
   B. reducing agent
   C. drying agent
   D. colouring agent

3. Water of crystallization can be removed by________________?

   A. drying
   B. heating
   C. evaporation
   D. All of the above

4. The residue obtained after the crystallization of sugar from concentrated sugar cane juice is called__________________?

   A. Mother liquor
   B. Filterate
   C. Extract
   D. Molasses

5. Ratio of the amount of solute in organic and aqueous solvent is________________?

   A. Retardation factor
   B. Distribution co-efficient
   C. Distribution in aqueous solution
   D. All statements are wrong

6. A technique of partition chromatography in which the solvent is in a pool at the bottom of container_______________?

   A. Adsorption chromatography
   B. Ascending chromatography
   C. Radial chromatography
   D. Descending chromatography

7. In solvent extraction ether is used to separate products of organic synthesis from________________?

   A. water
   B. iodine
   C. hydrochloric acid
   D. gases

8. The solvent or mixture of solvents used for separation of compounds is called____________________?

   A. Stationary phase
   B. Mobile phase
   C. Dynamic phase
   D. Static phase

9. A substance having very high vapour pressure at its melting point on heating will show_______________?

   A. Melting
   B. Sublimation
   C. Decomposition
   D. Condensation

10. Solvent used in separation of biomolecules is _______________?

    A. Acetone
    B. Trichloroacetic acid
    C. Ether
    D. Alcohol

    Submitted by: Safeullah Bullo