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On addition of one mL solution of 10% Na...

On addition of one mL solution of `10%` NaCl to 10 mL gold sol in the presence fo `0.0250` g of starch, the coagulation is just prevented. Starch has the following gold number

A

0.025

B

0.25

C

2.5

D

None

Text Solution

Verified by Experts

The correct Answer is:
D
Required amount of starch =0.25g.
=250mg
Gold number =250.
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