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The coagulation of 10 ml of colloidal so...

The coagulation of 10 ml of colloidal solution of gold is completely prevented by addition of 0.25 g of a substance "X" to it before addition of 1 ml of 10% NaCl solution. The gold number of "X" is

A

0.25

B

25

C

250

D

2.5

Text Solution

Verified by Experts

Gold number is defined as number of milligrams of a lyophilic colloid that will just prevent the precipitation of 10 ml of gold sol on the addition of 1 ml of 10% NaCl solution.
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