Give examples of $O/W$ (oil-in-water) and $W/O$ (water-in-oil) emulsions.

Which of the following ions will have the minimum coagulating value for the sol obtained by adding $FeCl_3$ solution to a slight excess of $NaOH$?

The flocculation value of $HCl$ for arsenic sulphide sol is $30 \; mmol \; L^{-1}$. If $H_{2}SO_{4}$ is used for the flocculation of arsenic sulphide,the amount,in grams,of $H_{2}SO_{4}$ in $250 \; mL$ required for the above purpose is (molecular mass of $H_{2}SO_{4} = 98 \; g/mol$)

The most effective coagulating agent among the options for $Sb_2S_3$ sol is

Which of the following is a correct statement?

Which of the following anions has the maximum coagulating power for the precipitation of a positive sol?