When silver nitrate solution is added to potassium iodide solution,then the sol produced is:

On addition of $1 \ mL$ solution of $10\% \ NaCl$ to $10 \ mL$ gold sol in presence of $0.025 \ g$ of starch,the coagulation is just prevented. The gold number of starch is

The coagulation of $10 \, mL$ of gold sol is prevented by the addition of $0.025 \, g$ of starch to it before adding $1 \, mL$ of $10 \% \, NaCl$ solution. The gold number of starch is .............

Which of the following can form micelles in aqueous solution?

Which of the following will show Tyndall effect?

What does the gold number indicate?