JEE Main Chemical Equilibrium Practice Questions With Solutions

For the given hypothetical reactions, the equilibrium constants are as follows :

$\begin{array}{rl}& \mathrm{X}\rightleftharpoons \mathrm{Y};{\mathrm{K}}_1=1.0\\ & \mathrm{Y}\rightleftharpoons \mathrm{Z};{\mathrm{K}}_2=2.0\\ & \mathrm{Z}\rightleftharpoons \mathrm{W};{\mathrm{K}}_3=4.0\end{array}$& X \rightleftharpoons Y ; K_{1} = 1.0 \\ & Y \rightleftharpoons Z ; K_{2} = 2.0 \\ & Z \rightleftharpoons W ; K_{3} = 4.0

The equilibrium constant for the reaction $\mathrm{X}\rightleftharpoons \mathrm{W}$X \rightleftharpoons W is

The ratio $\frac{K_P}{K_C}$\frac{K_{P}}{K_{C}} for the reaction :

${\mathrm{CO}}_{(\mathrm{g})}+\frac{1}{2}{\mathrm{O}}_{2(\mathrm{g})}\rightleftharpoons {\mathrm{CO}}_{2(\mathrm{g})}$CO_{\left(\right. g \left.\right)} + \frac{1}{2} O_{2 \left(\right. \textrm{ } g \left.\right)} \rightleftharpoons CO_{2 \left(\right. \textrm{ } g \left.\right)} is :

At $-{20}^{\circ }\mathrm{C}$- 20^{\circ} C and $1\mathrm{atm}$1 \textrm{ } atm pressure, a cylinder is filled with equal number of ${\mathrm{H}}_2,{\mathrm{I}}_2$H_{2} , I_{2} and $\mathrm{HI}$HI molecules for the reaction${\mathrm{H}}_2(\mathrm{g})+{\mathrm{I}}_2(\mathrm{g})\rightleftharpoons 2\mathrm{HI}(\mathrm{g})$H_{2} \left(\right. \textrm{ } g \left.\right) + I_{2} \left(\right. \textrm{ } g \left.\right) \rightleftharpoons 2 HI \left(\right. g \left.\right), the ${\mathrm{K}}_{\mathrm{p}}$K_{p} for the process is $x\times {10}^{-1}$x \times 10^{- 1}.

$\mathrm{x}=$x = __________.

[Given : $\mathrm{R}=0.082\mathrm{L}\mathrm{atm}{\mathrm{K}}^{-1}{\mathrm{mol}}^{-1}$R = 0.082 \textrm{ } L \textrm{ } atm \left(\textrm{ } K\right)^{- 1} \left(\textrm{ } mol\right)^{- 1}]

Given below are two statements :

Statement I : On passing ${\mathrm{HCl}}_{(\mathrm{g})}$HCl_{\left(\right. g \left.\right)} through a saturated solution of ${\mathrm{BaCl}}_2$BaCl_{2}, at room temperature white turbidity appears.

Statement II : When $\mathrm{HCl}$HCl gas is passed through a saturated solution of $\mathrm{NaCl}$NaCl, sodium chloride is precipitated due to common ion effect.

In the light of the above statements, choose the most appropriate answer from the options given below :

The following reaction occurs in the Blast furnance where iron ore is reduced to iron metal

${\mathrm{Fe}}_2{\mathrm{O}}_{3(s)}+3{\mathrm{CO}}_{(g)}\rightleftharpoons {\mathrm{Fe}}_{(j)}+3{\mathrm{CO}}_{2(g)}$Fe_{2} O_{3 \left(\right. s \left.\right)} + 3 CO_{\left(\right. g \left.\right)} \rightleftharpoons Fe_{\left(\right. j \left.\right)} + 3 CO_{2 \left(\right. g \left.\right)}

Using the Le-chatelier's principle, predict which one of the following will not disturb the equilibrium.

The equilibrium constant for the reaction

${\mathrm{SO}}_3(\mathrm{g})\rightleftharpoons {\mathrm{SO}}_2(\mathrm{g})+\frac{1}{2}{\mathrm{O}}_2(\mathrm{g})$SO_{3} \left(\right. \textrm{ } g \left.\right) \rightleftharpoons SO_{2} \left(\right. \textrm{ } g \left.\right) + \frac{1}{2} O_{2} \left(\right. \textrm{ } g \left.\right)

is ${\mathrm{K}}_{\mathrm{c}}=4.9\times {10}^{-2}$K_{c} = 4.9 \times 10^{- 2}. The value of ${\mathrm{K}}_{\mathrm{c}}$K_{c} for the reaction given below is $2{\mathrm{SO}}_2(\mathrm{g})+{\mathrm{O}}_2(\mathrm{g})\rightleftharpoons 2{\mathrm{SO}}_3(\mathrm{g})$2 SO_{2} \left(\right. \textrm{ } g \left.\right) + O_{2} \left(\right. \textrm{ } g \left.\right) \rightleftharpoons 2 SO_{3} \left(\right. \textrm{ } g \left.\right) is :

${\mathrm{A}}_{(\mathrm{g})}\rightleftharpoons {\mathrm{B}}_{(\mathrm{g})}+\frac{\mathrm{C}}{2}(\mathrm{g})$A_{\left(\right. g \left.\right)} \rightleftharpoons B_{\left(\right. g \left.\right)} + \frac{C}{2} \left(\right. g \left.\right) The correct relationship between ${\mathrm{K}}_{\mathrm{P}},\alpha$K_{P} , \alpha and equilibrium pressure $\mathrm{P}$P is

For the given reaction, choose the correct expression of ${\mathrm{K}}_{\mathrm{C}}$K_{C} from the following :-

${\mathrm{Fe}}_{(\mathrm{aq})}^{3+}+{\mathrm{SCN}}_{(\mathrm{aq})}^{-}\rightleftharpoons (\mathrm{FeSCN}{)}_{(\mathrm{aq})}^{2+}$Fe_{\left(\right. aq \left.\right)}^{3 +} + SCN_{\left(\right. aq \left.\right)}^{-} \rightleftharpoons \left(\right. FeSCN \left.\right)_{\left(\right. aq \left.\right)}^{2 +}

For a concentrated solution of a weak electrolyte (${\mathrm{K}}_{\text{eq }}=$K_{\text{eq}\textrm{ }} = equilibrium constant) ${\mathrm{A}}_2{\mathrm{B}}_3$A_{2} B_{3} of concentration '$c$c', the degree of dissociation '$\alpha$\alpha' is :

The effect of addition of helium gas to the following reaction in equilibrium state, is :

${\mathrm{PCl}}_5(\mathrm{g})\rightleftharpoons {\mathrm{PCl}}_3(\mathrm{g})+{\mathrm{Cl}}_2(\mathrm{g})$PCl_{5} \left(\right. g \left.\right) \rightleftharpoons PCl_{3} \left(\right. g \left.\right) + Cl_{2} \left(\right. g \left.\right)