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

Question

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

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`

Monjur Alahi

5 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - 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.

5 views Answered 2023-02-05 15:29