Surface Chemistry

Short Answer Type

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What is occulusion?

Answer:
Adsorption of gases on the surface of metals is called occlusion.
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    Suggest a physical method for the preparation of phosphorus sol.
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    Why is a substance more effective in colloidal state?
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    Why is catalyst, in general, taken in the form of finely divided powder?
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    Give an example of a shape-selective catalyst.
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    What name is given to sol in which benzene is dispersion medium?
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    What is colloidion?
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    How can dialysis be made fast?
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    Give an example of peptizing agent?
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    Which of the following is adsorbed preferably: O2, NH3, CO?
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