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Gold numbers of protective colloids A, B...

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

B< D < A < C

B

D < A < C < B

C

C < B < D < A

D

A < C < B < D

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MODERN PUBLICATION-SURFACE CHEMISTRY-EXERCISE
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