Question
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
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D < A < C < B
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C < B < D < A
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A < C < B < D
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B < D < A < C
Solution
C.
A < C < B < D
Higher the gold number lesser will be the protective power of colloid.
