Which of the following graph is correctly matched with the given reaction?

$\left\{{\left[{\mathrm{NH}}_3\right]}_{\mathrm{initial}}=4 \mathrm{M}, \mathrm{degree} \mathrm{of} \mathrm{dissociation}\left(\mathrm{\alpha }\right)=0.4\right\}$

$2{\mathrm{NH}}_3\rightleftharpoons {\mathrm{N}}_2+3{\mathrm{H}}_2$

Graph of a reversible process;

${\mathrm{N}}_2+3{\mathrm{H}}_2 \stackrel{}{\rightleftharpoons } 2{\mathrm{NH}}_3+\mathrm{Heat}$

is given. Analyse the graph and answer the following question.

Identify the part of the graph which represents the forward reaction

[ OA, BA, AC]

Graph of a reversible process,

is given. Analyse the graph and answer the following question.

From the given statements, select the correct ones regarding chemical equilibrium.

(i0 The chemical equilibrium is 'static' at the molecular level.

(ii) Both reactants and products co-exist.

(iii) The rates of forward reaction and backward reactions are equal.

(iv) Chemical equilibrium is attained in an open system.

Using the data provided, find the value of equilibrium constant for the following reaction at $298 \mathrm{K}$ and $1$ atm pressure. ${\mathrm{NO}}_{\left(\mathrm{g}\right)}+\frac{1}{2}{\mathrm{O}}_2( \mathrm{g})\rightleftharpoons {\mathrm{NO}}_2( \mathrm{g})$
${\mathrm{\Delta }}_{\mathrm{f}}{\mathrm{H}}^0\left({\mathrm{NO}}_{\left(\mathrm{g}\right)}\right)=90.4\mathrm{kJ}.{\mathrm{mol}}^{-1}$

${\mathrm{\Delta }}_{\mathrm{f}}{\mathrm{H}}^0\left({\mathrm{NO}}_2\left(\mathrm{g}\right)\right)=32.48\mathrm{kJ}\cdot {\mathrm{mol}}^{-1}$

${\mathrm{\Delta S}}^{\circ }\mathrm{at} 298\mathrm{K}=-70.8\mathrm{J}\cdot {\mathrm{K}}^{-1}\cdot {\mathrm{mol}}^{-1}$

$\mathrm{antilog}(0.50)=3162$

For the reaction $\mathrm{R}\rightleftharpoons \mathrm{P}$, variation of concentration is plotted against time. The time at which the equilibrium establishes is as shown:

Which of the following regions show(s) equilibrium?

In the reaction ${\mathrm{PCl}}_5 \left(\mathrm{g}\right)\rightleftharpoons {\mathrm{PCl}}_3 \left(\mathrm{g}\right)+{\mathrm{Cl}}_2 \left(\mathrm{g}\right)$, which of the graphs is/are correct?

Among the following reactions, which one does not represent an equilibrium condition?

$\mathrm{a}.$Reaction of equimolar solutions of ${\mathrm{BaCl}}_2$ and ${\mathrm{Na}}_2{\mathrm{SO}}_4$ in a closed vessel.

$\mathrm{b}.$ Few drops of water are present along with air in a balloon and temperature of the balloon is constant.

$\mathrm{c}.$Water boiling in an open vessel over a burner, and the temperature of water is constant.

$\mathrm{d}.$ Decomposition of lime stone in a closed vessel.