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0.025 gm of starch solution is required ...

`0.025` gm of starch solution is required to prevent coagulation of 10 ml gold sol. When 1 ml of
`10% NaCl` Solution is present. What is the gold number of starch sol?

Text Solution

Verified by Experts

The correct Answer is:
`25`
Gold number is minimum amount of protective colloid which can protect 10 mL standard gold sol from coagulation when 1 mL of `10% NaCl` is added.
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