Test: Emulsions and Gels. - JEE MCQ
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Test: Emulsions and Gels. - Question 1
white precipitate of 
is peptized with di. 
. The sol particle will carry
Detailed Solution for Test: Emulsions and Gels. - Question 1
(Positive charge)
Test: Emulsions and Gels. - Question 2
The gold numbers of protective colloids 
and 
are 
and 40 respectively. The protective powers of 
and 
are in the order :
and are and 40 respectively. The protective powers of and are in the order :
Detailed Solution for Test: Emulsions and Gels. - Question 2
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Test: Emulsions and Gels. - Question 3
In an experiment, addition of 
of 
to 
of arsenius sulphide sol just causes the complete coagulation in 
. The flocculating value of the effective ion is
of to of arsenius sulphide sol just causes the complete coagulation in . The flocculating value of the effective ion is
Detailed Solution for Test: Emulsions and Gels. - Question 3
sol is negatively charged owing to preferential adsorption of 
ions. Cation would be the effective ion in coagulation. Flocculating value 
minimum milli mol of the effective ion per litre of sol = 
Test: Emulsions and Gels. - Question 4
Arrange the following electrolytes in the increasing order of coagulating power for ferric hydroxide sol
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Test: Emulsions and Gels. - Question 6
Given below are a few electrolytes, indicate which one among them will bring about the coagulation of a gold sol quickest and in the least of concentration?
Detailed Solution for Test: Emulsions and Gels. - Question 6
is most effective for coagulation.
Test: Emulsions and Gels. - Question 7
Under the influence of an electric field, the particles in a sol migrate towards cathode. The coagulation of the same sol is studied using 
, 
and 
solutions. Their coagulating values will be in maximum for:
, and solutions. Their coagulating values will be in maximum for:
Detailed Solution for Test: Emulsions and Gels. - Question 7
Test: Emulsions and Gels. - Question 8
The process of converting a precipitate into colloidal solution is known as
Detailed Solution for Test: Emulsions and Gels. - Question 8
colloidal solution
precipitate
sol, the most effective coagulating agent is
Detailed Solution for Test: Emulsions and Gels. - Question 9
is a negatively charged sol, therefore positively charged ion is required to coagulate it. Hence, 
has the maximum coagulating power.
Test: Emulsions and Gels. - Question 10
Coagulation value of the electrolytes 
and 
for 
sol are 
and 52 respectively. How many times 
has greater coagulating power than 
?
and for sol are and 52 respectively. How many times has greater coagulating power than ?
Detailed Solution for Test: Emulsions and Gels. - Question 10
Test: Emulsions and Gels. - Question 11
The protecting power of lyophilic colloidal sol is expressed in terms of :
Detailed Solution for Test: Emulsions and Gels. - Question 11
Test: Emulsions and Gels. - Question 12
Which property of colloids is not dependent on the charge of colloidal particles?
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Test: Emulsions and Gels. - Question 14
Which of the following is most powerful to coagulate the negative colloid?
Detailed Solution for Test: Emulsions and Gels. - Question 14
Detailed Solution for Test: Emulsions and Gels. - Question 15
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