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The coagulation of 10 ml of gold sol is ...

The coagulation of 10 ml of gold sol is just prevented on adding 1 ml solution of 10% NaCl in the presence of 0.025 g of starch. The gold number of starch is:

A

`0.25`

B

`0.025 `

C

`2.5 `

D

`250.`

Text Solution

Verified by Experts

The correct Answer is:
C
Milligrams of starch used `0.025 xx 1000= 25` mg`
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