Which of the following metal nanoparticles is used for coating the filter material that acts as an effective bacterial disinfectant?

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

Molar conductivity $\left(\Lambda_m\right)$ of an aqueous solution of sodium stearate,which behaves as a strong electrolyte,is recorded at varying concentrations $(c)$ of sodium stearate. Which one of the following plots provides the correct representation of micelle formation in the solution? (Critical micelle concentration $(CMC)$ is marked with an arrow in the figures.)

Match List-$I$ with List-$II$ and select the correct option:

List-$I$	List-$II$
$I$. Colloidal antimony	$A$. Kala-azar
$II$. Silver sol	$B$. Intramuscular injection
$III$. Milk of magnesia	$C$. Eye lotion
$IV$. Gold sol	$D$. Stomach disorder

Which of the following exhibits the minimum coagulating power for the precipitation of a positively charged ferric oxide sol?

Which colloidal sol can be prepared by the chemical oxidation method?