InterviewSolution
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InterviewSolution
| 1. |
When `6xx10^(-5)g` of a protective colloid was added to `20mL` of a standard gold sol, the precipitation of latter was just prevented on addition of `2mL` of `10%NaCl` solution. The gold number of a protective colloid isA. 3B. `3xx10^(-5)`C. 0.06D. 0.03 |
| Answer» Gold number `=(6.0xx10^(-5)xx10^(3)(mg)xx10)/(20)=0.03` Gold number `=(6.0xx10^(-5)xx10^(3)(mg)xx10)/(20)=0.03` | |