The charge of $SnO_2$-sol in alkaline and acidic medium are respectively (Hint: $SnO_2$ is amphoteric oxide).

Lyophilic sols are more stable than lyophobic sols because their particles are

In a colloidal solution,both the dispersed phase and dispersion medium are in liquid phase. What is the type of colloid?

The size of colloidal particles is . . .

$Fe(OH)_3$ is a positively charged sol. For its precipitation, the best precipitating agent is:

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