Gold numbers of protective colloids A, B, C and D are 0.50,
0.01, 0.10 and 0.005, respectively. The correct order of their
protective powers is
(a) D < A < C < B (b) C < B < D < A
(c) A < C < B < D (d) B < D < A < C
Answers
Answered by
1
The correct order of the
protective powers of the given colloids is :
(c) A < C < B < D
1. The protective power is inversely proportional to the gold number of the colloid
2. Lower the gold number, stronger is the protective colloid.
3. Thus, from the given values of the gold numbers we see that the correct order of their
protective powers is : A < C < B < D.
Answered by
1
The trend is A < C < B < D.
Explanation:
- The gold number of a colloid is defined as minimum amount of protective colloid in milligrams which change the colour from red to violet of 10ml gold solution by the addition of 1ml 10% NaCl solution.
- So we can well know that more the gold number, the less is the protective power of the colloid.
- Here the colloid D has least gold number of 0.005, B has the gold number of 0.01, C has the gold number of 0.1 and A has the gold number of 0.5.
- So, the trend of the protective nature of the colloids is A < C < B < D.
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