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