Chemistry Mcq Questions For Class 11 Pdf Download Chapter 2 | Online Mcq Test For Class 11 Chemistry

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Chapter 2

Experimental Techniques in Chemistry

1. In paper chromatography, the point to which the solvent rises to maximum extent is called:

  1. Eluent
  2. Chromatogram
  3. Solvent front ent front
  4. Base line

2. Which one of the following substances is used as decolorizing agent:

  1. Animal charcoal
  2. Conc. H2SO4
  3. CaCl2
  4. Silica gel

3. The iodi ne present in water can be separated by which one of the following techniques:

  1. Sublimation
  2. Chromatography
  3. Filtration
  4. Solvent extraction

4. Chromatography in which the stationary phase is liquid will be known as:

  1. Adsorption chromatography
  2. Partition chromatography
  3. Column chromatography
  4. None of these

5. Rate of filtration can be increased using:

  1. Desiccator
  2. Chromatographic tank
  3. Cold finger
  4. Suction flask

6. A component having small value of K (distribution coefficient) mostly remains in:

  1. Stationary phase
  2. Mobile phase
  3. Chromatographic tank

7. None of these Direct conversion of solid into vapors is called:

  1. Crystallization
  2. Sublimation
  3. Distribution
  4. Vaporization

8. Which of the following is purified by sublimation:

  1. Naphthalene
  2. Benzoic acid
  3. Ammonium chloride
  4. All of these

9. Substance that does not show the process of sublimation is:

  1. K2Cr0O7
  2. Iodine
  3. Naphthalene
  4. NH4Cl

10. Solvent extraction is an equilibrium process and is controlled by:

  1. Distribution law
  2. The amount of solvent used
  3. Law of mass action
  4. The amount of solute

11. Which is not used as drying agent in vacuum desiccator is:

  1. P2O5
  2. CaCl2
  3. MgCl2
  4. Silica gel

12. Which chemical do not undergo sublimation?

  1. KMnO4
  2. Naphthalene
  3. NH4Cl
  4. Iodine

13. Iodine dissolves in water in the presence of KI due to formation of which one of the following species?

  1. 12
  2. 1
  3. 13
  4.  

14. The most common solvent used in solvent extraction is:

  1. Acetone
  2. Ethanol
  3. Rectified spirit
  4. Diethyl ether

15. Which of the following substance shows the property of sublimation?

  1. Sodium chloride
  2. Ammonium chloride
  3. Copper chloride
  4. Acetic acid

16. In paper chromatography, the mobile phase is usually:

  1. Liquid ammonia
  2. Water
  3. Organic liquid
  4. None of these

17. The comparative rate at which the solutes move in paper chromatography depends on:

  1. The size of paper
  2. Rr values of solutes
  3. Temperature of the experiment
  4. Size of the chromatographic tank used

18. When hot saturated solution is cooled very slowly we get:

  1. Medium size crystals
  2. Large size crystals
  3. Premature crystallization of the substance
  4. No crystals

19. Chromatography is the process which involves the distribution of a solute between:

  1. Two mobile phases
  2. A stationary phase and a mobile phase
  3. Two stationary and two mobile phases
  4. Two stationary phases

20. In CCl4 solvent, I2 shows:

  1. Blue colour
  2. Brown colour
  3. Pink colour
  4. Purple colour

21. The drying Agents used in vacuum desiccator are:

  1. CaCl2
  2. Silica gel
  3. Both a and b
  4. None

22. The ratio of the solute in organic phase to that in aqueous phase is called:

  1. Rate constant
  2. Equilibrium constant
  3. Distribution coefficient
  4. Arrhenius constant

23. When an organic compound which is volatile or thermally unstable it is separated by:

  1. Crystallization
  2. Sublimation
  3. Solvent extraction
  4. Chromatography

24. Iodine can be purified by process of:

  1. Evaporation
  2. Saponification
  3. Sublimation
  4. Crystallization

25. Insoluble particles can be separated from a liquid by:

  1. Sublimation
  2. Solvent extraction
  3. Filtration
  4. Crystallization

26. Repeated extraction using small portion of solvent are more:

  1. Accurate
  2. Efficient
  3. Slow
  4. Rapid

27. The chromatography in which stationary phase is liquid is called:

  1. Partition chromatography
  2. Column chromatography
  3. Adsorption chromatography
  4. All of these

28. In chromatography the stationary phase:

  1. is a solid
  2. Is a liquid
  3. May be liquid or gas
  4. May be solid or liquid

29. The drying agents used in vacuum desiccator are:

  1. AGCI
  2. NH4Cl
  3. CaCl2
  4. AICI:

30. Gooch crucible is made of:

  1. Asbestos
  2. Clay
  3. Porcelain
  4. Iron

31. Solvent extraction is a process:

  1. Exothermic
  2. Endothermic
  3. Equilibrium
  4. Non-equilibrium

32. Purity of a substance is checked by:

  1. Crystallization
  2. Sublimation
  3. Solvent extraction
  4. Chromatography

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