The gold numbers of A, B, C and D are 0.04, 0 | vedclass

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(B) The protective power of a lyophilic colloid is inversely proportional to its gold number.Gold number is defined as the minimum amount of protectiv

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$B > A > C > D$

Vedclass · Answer

(B) The protective power of a lyophilic colloid is inversely proportional to its gold number.Gold number is defined as the minimum amount of protective colloid in milligrams that prevents the coagulation of $10 \ mL$ of a standard gold sol when $1 \ mL$ of $10\% \ NaCl$ solution is added to it.Given gold numbers:$A = 0.04$$B = 0.002$$C = 10$$D = 25$Since protective power $\propto \frac{1}{	ext{Gold number}}$,the smaller the gold number,the higher the protective power.Comparing the values: $0.002 Therefore,the order of protective power is $B > A > C > D$.

The gold numbers of $A, B, C$ and $D$ are $0.04, 0.002, 10$ and $25$ respectively. What is the order of their protective power?

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