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

Related Mcqs:

1. Which of the following way in used for classification of chromatography ?

   A. Shape
   B. Phase
   C. Mechanism
   D. All

2. The stationary and mobile phases in paper chromatography are____________?

   A. Liquid/liquid
   B. Solid/liquid
   C. Liquid/solid
   D. Liquid/gas

   Submitted by: Muhammad Ali Kunbhar

3. Chromatography is used to separate _________ ?

   A. Solution
   B. Mixtures
   C. Molecules
   D. Atoms

   Submitted by: Rashid Mehmood

4. 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

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

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

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

   A. needed
   B. avoided
   C. depends on temperature
   D. crystallization does not involve heating

7. 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

8. Which of the following always increases on going from top to bottom in a group ?

   A. Metallic character
   B. Electronegativity
   C. Oxidizing power
   D. Tendency to get reduced

9. Benzene is a good solvent for__________________?

   A. fats
   B. resins
   C. iodine
   D. all the above

10. Strong Nucleophile in polar aprotic solvent?

    A. Flouride ion
    B. Bromide ion
    C. Chloride ion
    D. Iodide ion

    Submitted by: Safeullah Bullo