The coagulation of $100 m L$ of colloidal solution of gold is completely prevented by addition of $0.25 g$ of a substance " $X$ " to it before addition of $1 m L$ of $10$ % $N a C l$ solution. The gold number of " $X$ " is:

0.25

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25

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250

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2.5

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Solution

The correct option is C $250$
Gold Number Of a protective colloid is a minimum weight of it milligram which must be added to 10ml of a standard red gold sol so that no coagulation of the gold sol. Hence, the gold number will be 250 as it should be added 250 milligrams to prevent coagulation.

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Q. The coagulation of

100 m L

of a colloidal solution of gold is completely prevented by adding

0.25 g

of starch to it before adding

10 m L

10

N a C l

solution. Find out the gold number of starch.

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The coagulation of 100mL of colloidal solution of gold is completely prevented by addition of 0.25g of a substance "X" to it before addition of 1mL of 10% NaCl solution. The gold number of "X" is:

The correct option is C 250Gold Number Of a protective colloid is a minimum weight of it milligram which must be added to 10ml of a standard red gold sol so that no coagulation of the gold sol. Hence, the gold number will be 250 as it should be added 250 milligrams to prevent coagulation.

The coagulation of $100 m L$ of colloidal solution of gold is completely prevented by addition of $0.25 g$ of a substance " $X$ " to it before addition of $1 m L$ of $10$ % $N a C l$ solution. The gold number of " $X$ " is:

The correct option is C $250$
Gold Number Of a protective colloid is a minimum weight of it milligram which must be added to 10ml of a standard red gold sol so that no coagulation of the gold sol. Hence, the gold number will be 250 as it should be added 250 milligrams to prevent coagulation.