The colloidal solution of mercury in water can be easily obtained by

The size of colloidal particles varies from:

Whipped cream is an example of a colloidal system where the dispersion medium and dispersed phase are:

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 $H_{2}SO_{4} = 98 \; g/mol$)

An example for hydrophobic sol among the following is

Which of the following nanomaterials has two dimensions less than $100 \ nm$?