05. Le-Chatelier Principle and It's Application
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Chemical Equilibrium

229203 Equilibrium constant $K$, for the reaction,
$2 \mathrm{HI}(\mathrm{g}) \rightleftharpoons \mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g})$
at room temperature is 2.85 and that at $698 \mathrm{~K}$ is $1.4 \times 10^{-2}$. This implies that the forward reaction is :

1 exothermic
2 endothermic
3 exergonic
4 unpredictable
BCECE-2003
Chemical Equilibrium

229168 For the reversible reactions,
$\mathbf{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_{3}(\mathrm{~g})+$ heat
The equilibrium, shifts is forward direction

1 by increasing the concentration of $\mathrm{NH}_{3}(\mathrm{~g})$
2 by decreasing the pressure
3 by decreasing the concentrations of $\mathrm{N}_{2}(\mathrm{~g})$ and $\mathrm{H}_{2}(\mathrm{~g})$
4 by increasing pressure and decreasing temperature
NEET-2014
Chemical Equilibrium

229154 What is the effect of increasing pressure on the dissociation of $\mathrm{PCl}_{5}$ according to the equation? $\mathbf{P C l}_{5}(\mathrm{~g}) \rightleftharpoons \quad \mathbf{P C l}_{3}(\mathrm{~g})+\mathbf{C l}_{2}(\mathrm{~g})$
#[Qdiff: Easy, QCat: Theory Based, examname:

1 Dissociation decreases
2 Dissociation increases
3 Dissociation does not change
4 None of the above
(d.) None of the above
Chemical Equilibrium

229155 Le-Chateliar's principle is not applicable to -

1 $\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}$ (g) $\rightleftharpoons \quad 2 \mathrm{HI}(\mathrm{g})$
2 $\mathrm{Fe}(\mathrm{s})+\mathrm{S}(\mathrm{s}) \rightleftharpoons \quad \mathrm{Fe}(\mathrm{s})$
3 $\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons \quad 2 \mathrm{NH}_{3}(\mathrm{~g})$
4 $\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons \quad 2 \mathrm{NO}(\mathrm{g})$
[AP EAPCET 20.08.2021 Shift-I]
NEET DIGITAL LIBRARY
Chemical Equilibrium

229203 Equilibrium constant $K$, for the reaction,
$2 \mathrm{HI}(\mathrm{g}) \rightleftharpoons \mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g})$
at room temperature is 2.85 and that at $698 \mathrm{~K}$ is $1.4 \times 10^{-2}$. This implies that the forward reaction is :

1 exothermic
2 endothermic
3 exergonic
4 unpredictable
BCECE-2003
Chemical Equilibrium

229168 For the reversible reactions,
$\mathbf{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_{3}(\mathrm{~g})+$ heat
The equilibrium, shifts is forward direction

1 by increasing the concentration of $\mathrm{NH}_{3}(\mathrm{~g})$
2 by decreasing the pressure
3 by decreasing the concentrations of $\mathrm{N}_{2}(\mathrm{~g})$ and $\mathrm{H}_{2}(\mathrm{~g})$
4 by increasing pressure and decreasing temperature
NEET-2014
Chemical Equilibrium

229154 What is the effect of increasing pressure on the dissociation of $\mathrm{PCl}_{5}$ according to the equation? $\mathbf{P C l}_{5}(\mathrm{~g}) \rightleftharpoons \quad \mathbf{P C l}_{3}(\mathrm{~g})+\mathbf{C l}_{2}(\mathrm{~g})$
#[Qdiff: Easy, QCat: Theory Based, examname:

1 Dissociation decreases
2 Dissociation increases
3 Dissociation does not change
4 None of the above
(d.) None of the above
Chemical Equilibrium

229155 Le-Chateliar's principle is not applicable to -

1 $\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}$ (g) $\rightleftharpoons \quad 2 \mathrm{HI}(\mathrm{g})$
2 $\mathrm{Fe}(\mathrm{s})+\mathrm{S}(\mathrm{s}) \rightleftharpoons \quad \mathrm{Fe}(\mathrm{s})$
3 $\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons \quad 2 \mathrm{NH}_{3}(\mathrm{~g})$
4 $\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons \quad 2 \mathrm{NO}(\mathrm{g})$
[AP EAPCET 20.08.2021 Shift-I]
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Chemical Equilibrium

229203 Equilibrium constant $K$, for the reaction,
$2 \mathrm{HI}(\mathrm{g}) \rightleftharpoons \mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g})$
at room temperature is 2.85 and that at $698 \mathrm{~K}$ is $1.4 \times 10^{-2}$. This implies that the forward reaction is :

1 exothermic
2 endothermic
3 exergonic
4 unpredictable
BCECE-2003
Chemical Equilibrium

229168 For the reversible reactions,
$\mathbf{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_{3}(\mathrm{~g})+$ heat
The equilibrium, shifts is forward direction

1 by increasing the concentration of $\mathrm{NH}_{3}(\mathrm{~g})$
2 by decreasing the pressure
3 by decreasing the concentrations of $\mathrm{N}_{2}(\mathrm{~g})$ and $\mathrm{H}_{2}(\mathrm{~g})$
4 by increasing pressure and decreasing temperature
NEET-2014
Chemical Equilibrium

229154 What is the effect of increasing pressure on the dissociation of $\mathrm{PCl}_{5}$ according to the equation? $\mathbf{P C l}_{5}(\mathrm{~g}) \rightleftharpoons \quad \mathbf{P C l}_{3}(\mathrm{~g})+\mathbf{C l}_{2}(\mathrm{~g})$
#[Qdiff: Easy, QCat: Theory Based, examname:

1 Dissociation decreases
2 Dissociation increases
3 Dissociation does not change
4 None of the above
(d.) None of the above
Chemical Equilibrium

229155 Le-Chateliar's principle is not applicable to -

1 $\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}$ (g) $\rightleftharpoons \quad 2 \mathrm{HI}(\mathrm{g})$
2 $\mathrm{Fe}(\mathrm{s})+\mathrm{S}(\mathrm{s}) \rightleftharpoons \quad \mathrm{Fe}(\mathrm{s})$
3 $\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons \quad 2 \mathrm{NH}_{3}(\mathrm{~g})$
4 $\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons \quad 2 \mathrm{NO}(\mathrm{g})$
[AP EAPCET 20.08.2021 Shift-I]
For More Updates join with Us
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Chemical Equilibrium

229203 Equilibrium constant $K$, for the reaction,
$2 \mathrm{HI}(\mathrm{g}) \rightleftharpoons \mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}(\mathrm{~g})$
at room temperature is 2.85 and that at $698 \mathrm{~K}$ is $1.4 \times 10^{-2}$. This implies that the forward reaction is :

1 exothermic
2 endothermic
3 exergonic
4 unpredictable
BCECE-2003
Chemical Equilibrium

229168 For the reversible reactions,
$\mathbf{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_{3}(\mathrm{~g})+$ heat
The equilibrium, shifts is forward direction

1 by increasing the concentration of $\mathrm{NH}_{3}(\mathrm{~g})$
2 by decreasing the pressure
3 by decreasing the concentrations of $\mathrm{N}_{2}(\mathrm{~g})$ and $\mathrm{H}_{2}(\mathrm{~g})$
4 by increasing pressure and decreasing temperature
NEET-2014
Chemical Equilibrium

229154 What is the effect of increasing pressure on the dissociation of $\mathrm{PCl}_{5}$ according to the equation? $\mathbf{P C l}_{5}(\mathrm{~g}) \rightleftharpoons \quad \mathbf{P C l}_{3}(\mathrm{~g})+\mathbf{C l}_{2}(\mathrm{~g})$
#[Qdiff: Easy, QCat: Theory Based, examname:

1 Dissociation decreases
2 Dissociation increases
3 Dissociation does not change
4 None of the above
(d.) None of the above
Chemical Equilibrium

229155 Le-Chateliar's principle is not applicable to -

1 $\mathrm{H}_{2}(\mathrm{~g})+\mathrm{I}_{2}$ (g) $\rightleftharpoons \quad 2 \mathrm{HI}(\mathrm{g})$
2 $\mathrm{Fe}(\mathrm{s})+\mathrm{S}(\mathrm{s}) \rightleftharpoons \quad \mathrm{Fe}(\mathrm{s})$
3 $\mathrm{N}_{2}(\mathrm{~g})+3 \mathrm{H}_{2}(\mathrm{~g}) \rightleftharpoons \quad 2 \mathrm{NH}_{3}(\mathrm{~g})$
4 $\mathrm{N}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightleftharpoons \quad 2 \mathrm{NO}(\mathrm{g})$
[AP EAPCET 20.08.2021 Shift-I]
NEET DIGITAL LIBRARY