Trying to find the right answer to this..

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Surface Chemistry

Short Answer Type

71. Write one example of each category in which sols particles carry – ve and + ve charges.

120 Views

72. Give one example each of W / O and O / W emulsion.

126 Views

73. Which names are given if sols have dispersion medium of (a) H₂O, (b) alcohol, (c) benzene?

115 Views

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.

Answer:
Acoording to the Hardy- Schulz rule the coagulation capacity depends on the valence of the active ion.thus order is:

Th(NO₃)₄ > FeCl₃ > BaCl₂ > NaCl.

117 Views

75. Why are lyophilic sols self-stabilized?

226 Views

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?

860 Views

77. How can a colloidal solution and true solution of the same colour be distinguished from each other?

257 Views

78. Write the reaction in which bismuth molybdate is used as a catalyst.

117 Views

79. What is the difference in the nature of a dilute soap solution and a concentrated soap solution?

524 Views

80. Give an example of (i) micelles system (ii) macromolecular colloid.

148 Views

Previous Year Papers

Test Series

Test Yourself

Short Answer Type

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.

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.