A) 2.5
B) 25
C) 0.25
D) 0.025
Correct Answer: B
Solution :
[b] Gold Number is the minimum amount of lyophilic colloide in miligrams (starch in given case) which prevents the flocculation of 10 ml gold sol by the addition of 1ml of 10% \[NaCl\] solution. \[\therefore \] Gold number = miligram of starch \[=0.025\times {{10}^{3}}mg\] = 25You need to login to perform this action.
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