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When 6xx10^(-5)g of a protective colloid...

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 is

A

3

B

`3xx10^(-5)`

C

0.06

D

0.03

Text Solution

Verified by Experts

Gold number `=(6.0xx10^(-5)xx10^(3)(mg)xx10)/(20)=0.03`
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