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    Surface Chemistry

    Multiple Choice QuestionsShort Answer Type

    81. What is colloidion?
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    82. Which of the following is adsorbed preferably: O2, NH3, CO?
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    83. Why is a substance more effective in colloidal state?
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    84. Why is catalyst, in general, taken in the form of finely divided powder?

    Answer:

    Catalyst when taken in the form of finely divided powder, it has large surface area. Large the surface area, more will be activity as catalyst.
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    85. Suggest a physical method for the preparation of phosphorus sol.
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    86. What name is given to sol in which benzene is dispersion medium?
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    87. What is occulusion?
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    88. Give an example of a shape-selective catalyst.
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    89. How can dialysis be made fast?
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    90. Give an example of peptizing agent?
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