A) 25
B) 0.025
C) 0.25
D) 2.5
E) 0.0025
Correct Answer: A
Solution :
Gold number of protective colloid is: Colloid in milligrams which when added to 10 mL of gold solution just prevents its coagulation by 1 mL of\[10%\text{ }NaCl\]solution. Protective power \[\propto \,\frac{1}{gold\,number}\] The gold number of starch is 25, because it as very low protective power.You need to login to perform this action.
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