An example of a solid sol is

Lyophilic sols are more stable than lyophobic sols because:

$20 \ mL$ of $0.5 \ M \ NaCl$ is required to coagulate $200 \ mL$ of $As_2S_3$ sol in $2$ hours. The coagulating value of $NaCl$ is $...........$.

The disperse phase in colloidal iron $(III)$ hydroxide and colloidal gold is positively and negatively charged,respectively. Which of the following statements is $NOT$ correct?

Milk is an example of a/an ...... .

Which of the following is a property of a colloid?