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Gold number is a measure of...

Gold number is a measure of

A

stability of colloidal system

B

coagulating power of a colloid

C

size of colloidal particles

D

efficiency of the protective colloid

Text Solution

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The correct Answer is:
D
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Statement-1:Gold number is the measure of protective powers of different colloids. Statement-2: The smaller the gold number of lyophilic colloid, the smaller is its protective power.

Assertion: Gold number is the measure of protective powers of differents colloids. Reason: The smaller the gold number of lyophilic colloid, the smaller is its protective power.

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the protective power of the lyophilic colloids es expressed in terms of gold number, a term introduced by Zsigmondy. Gold number is the number of milli - gram of the protective colloid which prevent the coagulation of 10 mLof red gold sol , when 1 mL of a 10 per cent solution of sodium chloride is added to it . thus smaller the gold number of lyophillic colloid, the greater is the protective power. which of the following statement (S) is / are correct?