Protection of Lyophobic Sols and Gold Number

The coagulation of $100 \mathrm{ml}$ of a colloidal sol of gold is completely prevented by addition of 0.25 g of starch to it before adding $10 \mathrm{ml}$ of $10\% \mathrm{NaCl}$ solution. Find out the gold number of starch.

On addition of $1.0 \mathrm{ml}$ solution of $10\% \mathrm{NaCl}$ to $10 \mathrm{ml}$ gold sol in the presence of$0.5 \mathrm{gm}$ of starch, the coagulation is just prevented. The gold number of starch is

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

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

Gold numbers of protective colloids $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ are $0.7,0.02,0.12$ and $0.0047$, respectively. The correct order of their protective powers is _________

Calculate the value of 'a' if $0.3125\times \mathrm{a}\mathrm{gm}$ starch is required to prevent coagulation of 100 ml of gold sol adding 10 ml of 10% NaCl solution? Where Gold number of starch is 25.

The protective power of a lyophilic colloid is measured by the property called :

The coagulation of 10 cm³ of Gold sol by 1 ml 10% NaCl solution is completely prevented by addition of 0.25 g of starch to it. The gold number of starch is-

The gold numbers of a few protective colloids are given

$\begin{array}{ccc}x& & 0.005\\ y& & 3.5\\ z& & 40\end{array}$

The protective nature of these colloidal solutions follow the order

Gold number gives

Which of the following is the most effective in the coagulation of gold sol?

Which has least gold number?

The gold number of gelatin, haemoglobin and sodium acetate are $0.005, 0.05 \mathrm{and} 0.7$, respectively. The protective actions will be in the order

Gold numbers of protective colloids $\mathrm{A}, \mathrm{B}, \mathrm{C} \mathrm{and} \mathrm{D}$ are $0.50, 0.01, 0.10, \mathrm{and} 0.005$, respectively. The correct order of their protective powers is

The coagulation of $10\mathrm{ }{\mathrm{c}\mathrm{m}}^3$ of gold sol is completely prevented by addition of $0.050 \mathrm{g}$ of starch to it. The gold number of starch is:

On addition of 1mL solution of 10% NaCl to 10mL gold solution in the presence of 0.025 g of starch, the coagulation is prevented because starch has the following gold numbers

The gold numbers of some colloidal solutions are given below

Gold number of a lyophilic sol is such a property that

The coagulation of $100 \mathrm{mL}$ of a colloidal solution of gold is completely prevented by adding $0.03 \mathrm{g}$ of haemoglobin to it before adding, $1 \mathrm{mL}$ of $10\%$ $\mathrm{NaCl}$ solution. Calculate the gold number of haemoglobin

Four different colloids have the following gold number, Which one has most effective action?