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On additon of one ML of 10% NaCI soluti...

On additon of one ML of 10% NaCI solution of 10ml gold sol in presence of 0.25 gm of starch, the coagulation is just prevented, starch has gold number :

A

`0.025`

B

`0.25`

C

`2.5`

D

`25`

Text Solution

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