Exercise 1

On cooling of the following system at equilibrium, ${\mathrm{CO}}_{2 }\left(\mathrm{s}\right)\rightleftharpoons {\mathrm{CO}}_{2 }\left(\mathrm{g}\right)$:

The $\mathrm{pH}$ of $1 \mathrm{N}$ aqueous solutions of $\mathrm{HCl}, {\mathrm{CH}}_3\mathrm{COOH}$ and $\mathrm{HCOOH}$ follows the order

A buffer solution can be prepared by mixing equal volumes of

Among the following, the correct statements is

The solubility of ${\mathrm{BaSO}}_4$ in pure water (in $\mathrm{g} {\mathrm{L}}^{-1}$) is the closest to [Given: ${\mathrm{K}}_{\mathrm{sp}}$ for ${\mathrm{BaSO}}_4$ is $1.0\times {10}^{-10}$ at $25°\mathrm{C}$. Molecular weight of ${\mathrm{BaSO}}_4$ is $233 \mathrm{g} {\mathrm{mol}}^{-1}$]

A reaction in equilibrium is represented by the following equation, $2{\mathrm{A}}_{\left(\mathrm{s}\right)}+3{\mathrm{B}}_{\left(\mathrm{g}\right)}\rightleftharpoons 3{\mathrm{C}}_{\left(\mathrm{g}\right)}+\mathrm{D}\left(\mathrm{g}\right)+{\mathrm{O}}_2$. If the pressure on the system is reduced to half of its original value:

In which of the following equilibrium reactions, the equilibrium would shift to right side. If the total pressure is decreased:

In a vessel containing ${\mathrm{SO}}_3, {\mathrm{SO}}_2$ and ${\mathrm{O}}_2$ at equilibrium, some helium gas is introduced so that the total pressure increases while the temperature and the volume remains constant. According to Le-Chatelier principle, the dissociation of ${\mathrm{SO}}_3$: