73.Which names are given if sols have dispersion medium of (a) H2O, (b) alcohol, (c) benzene?
Answer:
(a) Hydrosols (b) Alcosol (c) Benzosol.
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74.Write the order of effectiveness of the equimolar solutions of following electrolytes for coagulating a negatively charged sol. FeCl3, NaCl, BaCI2, Th(NO3)4.
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75.Why are lyophilic sols self-stabilized?
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76.A sol is prepared by addition of excess of AgNO3 solution in KI solution. What charge is likely to develop on the colloidal particles?
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77.How can a colloidal solution and true solution of the same colour be distinguished from each other?
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78.Write the reaction in which bismuth molybdate is used as a catalyst.
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79.What is the difference in the nature of a dilute soap solution and a concentrated soap solution?
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80.Give an example of (i) micelles system (ii) macromolecular colloid.
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