Calculate mass in kg of $4.48 \mathrm{dm}^3$ carbon dioxide at STP.

Calculate the molar mass of solute in a solution prepared by dissolving 1 gram in $0.3 \mathrm{~dm}^3$ solvent having osmotic pressure 0.2 atm at 300 K.

$$\left[\mathrm{R}=0.082 \mathrm{~dm}^3 \mathrm{~atm} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right]$$

Identify the product obtained when chlorobenzene is heated with conc. $\mathrm{HNO}_3$ in presence of conc. $\mathrm{H}_2 \mathrm{SO}_4$.

Which from following is a correct priority order for selection of principal functional group for nomenclature of polyfunctional compound?