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Gold number is...

Gold number is

A

The number of mg of lyophilic colloid which should be added to 10 mL of ferric hydroxide sol so as to prevent its coagulation by the addition of 1 mL of 10% sodium chloride solution

B

The number of mg of lyophilic colloid which should be added to 10 mL of standard gold sol so as to prevent its coagulation by the addition of 1 mL of 10% NaCl

C

The mg of gold salt to be added to a lyophilic colloid to coagulate it

D

The mg of an electrolyte required to coagulate a colloid

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The correct Answer is:
B
Properties of ionic solid
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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. gold number given an indication of

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. On addition of one mL of sloution of 10 % NaCl to 10 mL. of red gold sol in presence of 0l.025 g of starch the coagultion is just prevented . the gold number of starch is

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?

Gold number gives