Question
10−4 g of gelatin is required to be added to 100 cm3 of a stanadard gold solution to just prevent its precipitation by addition of 1 cm3 of 10% NaCl solution to it. Hence, gold number of gelatin is?
Answer: Option D
:
D
10−4g=0.1mg
100cm3 of gold sol require 0.1 mg
∴10cm3 of gold sol will required 0.01 mg
Hence, gold number = 0.01.
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:
D
10−4g=0.1mg
100cm3 of gold sol require 0.1 mg
∴10cm3 of gold sol will required 0.01 mg
Hence, gold number = 0.01.
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