Surface Chemistry MCQs Mock Test of Class 12th Chemistry

Welcome to your Surface Chemistry MCQs Mock Test of Class 12th Chemistry

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Question 1. The most commonly used adsorbent for chromatographic separation of organic compounds is
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Question 2. A freshly prepared precipitate is peptised by adding FeCl3 solution. The charge on the colloidal particles is due to the preferential adsorption of
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Question 3 . Substances whose solutions can readily diffuse through parchment membrane are
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Question 4. Why is alum added to water containing suspended impurities?
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Question 5. Movement of dispersion medium under the influence of electric field is known as
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Question 6. Which of the following is not a method of removing impurities from a colloidal sol?
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Question 7. Volume of one mole of any gas at NTP is
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Question 8. Tyndall effect confirms the
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Question 9. Which one of the following is alyophilic colloid?
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Question 10. Which of the following is not correct for enzyme catalysis?
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Question 11. Presence of traces of arsenious oxide (As2O3) in the reacting gases SO2 and O3 in presence of plantinised asbestos in contact process acts as
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Question 12. Shape selective catalysis is a reaction catalysed by
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Question 13. Which of the following types of metals make the most efficient catalyst?
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Question 14. The oxide of nitrogen which acts as a catalyst in lead chamber process is
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Question 15. The activity of an enzyme becomes ineffective
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Question 16. Which of the following can adsorb larger volume of hydrogen gas?
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Question 17. Which of the following gases present in a polluted area will be adsorbed most easily on the charcoal gas mask?
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Question 18. Which kind of catalysis can be explained on the basis of adsorption theory ?
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Question 19. A colloidal system is which liquid is dispersed phase and solid is dispersion medium is classified as
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Question 20. Which of the following will not form a colloidal system?
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Question 21. Fog in an example of colloidal system of
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Question 22. Substances which behave as normal electrolytes solution at low concentration and exhibit colloids properties at higher concentration are called
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Question 23. Which of the following acts as the best coagulating agent for ferric hydroxide sol?
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Question 24. The formation of micelles takes place only above
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Question 25. The size of colloidal particles ranges between
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Question 26. At CMC (critical micelle concentration) the surface molecules
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Question 27. Which of the following is not a method for coagulation of lyophobic sols?
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Question 28. The substances which behave as colloidal solutions at higher concentration are called
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Question 29. Which one of the following is an example of adsorption?
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Question 30. At 15oC out of H2, CH4, CO2, NH3, which gas will be adsorbed maximum by charcoal?
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Question 31. Which of the following colloids are solvent hating?
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Question 32. If the dispersed phase is a liquid and the dispersion medium is solid, the colloid is known as
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Question 33. The process of separating a crystalloid, from a colloid by filtration is called
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Question 34. The movement of colloidal particles towards the oppositely charged electrodes on passing electric current is known as
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Question 35. An emulsifier is a substance which
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Question 36. Which of the following kinds of catalysis can be explained by the adsorption theory?
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Question 37. The volume of gases H2, CH4, CO2 and NH3 adsorbed by 1 gm charcoal at 293 K can be given in the order?
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Question 38. The particles of a particular colloidal solution of arsenic trisulphide (As2S3) are negatively charged. Which 0.0005M solution of the following salts would be most effective in coagulating this colloidal solution?
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Question 39. Which is readily absorbed by activational charcoal
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Question 40. Molecules at the surface of solid have…………energy than molecules those inside
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Question 41. The adsorption of H2 on glass takes place: for this adsorption
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Question 42. Mainly which colligative property is used to determine the molar mass of a polymer?
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Question 43. When the particle size of a dispersed phase in colloidal solution increases
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Question 44. Find the incorrect statement
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Question 45. The presence of soluble soap as a emulsifying agent generally forms the formation of emulsion of
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Question 46. A substance which completely destroys or reduces the activity of the catalyst is called
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Question 47. Adsorption isostere is
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Question 48. The migration of positively-charged colloidal particles under an electrical field, towards the cathode is called
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Question 49. After increasing temperature, the rate of physiosorption :
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Question 50. If all the electrolytes are removed from the colloid by persistent dialysis then

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