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The coagulation of 100 ml gold sol is co...

The coagulation of 100 ml gold sol is completely prevented by adding 0.25 g of starch to it before adding 10 ml of 10% NaCl solution. Calculate the gold number of starch.

Text Solution

Verified by Experts

The correct Answer is:
5
Gold no is expressed in m.g.r
`100 rarr 0.25 gr`
`10 - 0.25 gr = 25m.gr = 5^2`
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