Addition of Inert Gas at Constant Volume

Q. On addition of an inert gas at constant volume to the reaction
$N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$ at equilibrium

1. Forward reaction is favoured
2. The reaction halts
3. Backward reaction is favoured
4. The reaction remains unaffected

Q. Which of the following equilibrium will not be affected if an inert gas is added at constant volume?

1. all of the above
2. $H_2\left(g\right)+I_2\left(g\right)\rightleftharpoons 2HI\left(g\right)$
3. $3H_2\left(g\right)+N_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$
4. $PC{l}_5\left(g\right)\rightleftharpoons PC{l}_3\left(g\right)+C{l}_2\left(g\right)$

Q. In a vessel containing $S{O}_3\left(g\right),S{O}_2\left(g\right)$ and $O_2\left(g\right)$ at equilibrium, some helium gas is introduced so that the total pressure increases while temperature and volume remain constant. According to Le Chatelier principle the dissociation of $S{O}_3$.

1. Remains unaltered
2. Changes unpredictably
3. Increases
4. Decreases

Q. Consider the following reactions:
(i) $PC{l}_5\left(g\right)\rightleftharpoons PC{l}_3\left(g\right)+C{l}_2\left(g\right)$
(ii) $N_2{O}_4\left(g\right)\rightleftharpoons 2N{O}_2\left(g\right)$
The addition of an inert gas at constant volume:

1. Will increase the dissociation of $PC{l}_5$ as well as $N_2{O}_4$
2. Will reduce the dissociation of $PC{l}_5$ as well as $N_2{O}_4$
3. Will increase the dissociation of $PC{l}_5$ and step up the formation of $N{O}_2$
4. Will not disturb the equilibrium of both the reactions

Q. Some inert gas is added at constant volume to the following reaction at equilibrium
$N{H}_{4}SH\left(s\right)\rightleftharpoons N{H}_3\left(g\right)+H_{2}S\left(g\right)$
Predict the effect of adding the inert gas:

1. The equilibrium shifts towards the forward direction
2. The equilibrium shifts towards the backward direction
3. The equilibrium remains unaffected
4. The value of $K_P$ is increased

Q.

K_p = 0.04 atm at 899 K for the equilibrium shown below. What is the equilibrium concentration of C₂H₆ when it is placed in a flask at 4.0 atm pressure and allowed to come to equilibrium?

Q. For a chemical reaction $3A\left(g\right)+B\left(g\right)\to A_{3}B\left(g\right),$ amount of $A_{3}B\left(g\right)$ at equilibrium is affected by

1. Temperature only
2. Temperature, pressure and catalyst
3. Pressure only
4. Temperature and pressure

Q.

Given the following reaction at equilibrium $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$. Some inert gas is added at constant volume. Predict which of the following facts will be affected?

1. More of is produced

2. Less of is produced

3. No effect on the degree of advancement of the reaction at equilibrium

4. of the reaction is increased

Q. For the given reaction:
$PC{l}_5\left(g\right)\rightleftharpoons PC{l}_3\left(g\right)+C{l}_2\left(g\right),$ the forward reaction at a constant temperature is favoured by which of the following conditions?

1. Introducing an inert gas at a constant volume.
   
2. Introducing chlorine gas in the container.
   
3. Introducing an inert gas at a constant pressure.
   
4. Increasing the volume of the container.

Q.

K_p = 0.04 atm at 899 K for the equilibrium shown below. What is the equilibrium concentration of C₂H₆ when it is placed in a flask at 4.0 atm pressure and allowed to come to equilibrium?

Q. Assertion :Assertion : In the dissociation of $PC{l}_5$ at constant pressure and temperature addition of helium at equilibrium increases the dissociation of $PC{l}_5$. Reason: Reason : Helium reacts with $C{l}_2$ and hence shifts the equilibrium in forward direction.

1. If both the assertion and reason are true and reason is the correct explanation of assertion.
2. If both the assertion and reason are true but reason is not the correct explanation of assertion.
3. If assertion is true but reason is false.
4. If both assertion and reason are false.

Q. For the equilibrium,
$LiCl\cdot {3NH}_3\left(s\right)\rightleftharpoons LiCl\cdot {NH}_3\left(s\right)+2{NH}_3\left(g\right)$ $K_p=9{atm}^2$ at ${37}^{o}C$.

1. $0.59$
2. $0.79$
3. $0.69$
4. $0.2$

Q. $N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$

Which of the following will not have any effect on the position of equilibrium?

1. addition of catalyst
2. both A and B
3. addition of inert gases at constant volume
4. addition of inert gases at constant pressure

Q. On addition of an inert gas at constant volume to the reaction
$N_2\left(g\right)+3H_2\left(g\right)\rightleftharpoons 2N{H}_3\left(g\right)$ at equilibrium

1. The reaction remains unaffected
2. Forward reaction is favoured
3. The reaction halts
4. Backward reaction is favoured

Q. In a vessel containing $S{O}_3$, $S{O}_2$ and $O_2$ at equilibrium helium gas is added at constant volume. The dissociation of $S{O}_3$:

1. Increases
2. Decreases
3. Remains constant
4. Unpredictable

Q. Some quantity of water is contained in a container as shown in figure. An inert gas is added to this system at constant pressure, the amount of liquid water in the vessel:

1. increase
2. decreases
3. renains same
4. changes unpredictably

Q. Consider a reaction:
$S{O}_{2}C{l}_2\left(g\right)\rightleftharpoons S{O}_2\left(g\right)+C{l}_2\left(g\right)$
Equilibrium is attained at ${25}^{\circ }C$ in a closed container.
At equilibrium, 2 moles of an inert gas Helium $\left(He\right)$ are introduced .
Which of the following statements is correct?

1. Concentrations of both $S{O}_2,C{l}_2$ doubles.
2. There will be no effect on the equilibrium.
3. Only concentration of $S{O}_2$ is reduced by half.
4. Twice the amount of $S{O}_{2}C{l}_2$ is formed.

Q.

Product the shift in equilibrium when the volume is decreased on the following equilibrium reactions:

(ii) ${\mathrm{N}}_2(\mathrm{g})+{\mathrm{O}}_2(\mathrm{g})\rightleftarrows 2\mathrm{NO}\left(\mathrm{g}\right)$

Q. For the reaction given below,

1. Both statements are true Statement - II is correct explanation of Statement - I
2. Both statements are true but Statement -II is not correct explanation of Statement - I
3. Statement - I is true but Statement - II is false
4. Statement - I is false but Statement - II is true

Q. For the formation of phosgene from $CO\left(g\right)$ and chlorine, $CO\left(g\right)+{Cl}_2\left(g\right)⟶CO{Cl}_2\left(g\right)$, the experimentally determined rate equation is, $\frac{d\left[CO{Cl}_2\right]}{dt}=k\left[CO\right]{\left[{Cl}_2\right]}^{3/2}$.
Is the following mechanism consistent with the rate equation?
$\left(i\right)$ ${Cl}_2\rightleftharpoons 2Cl$ (fast)
$\left(ii\right)$ $Cl+CO\rightleftharpoons COCl$ (fast)
$\left(iii\right)$ $COCl+{Cl}_2\rightleftharpoons CO{Cl}_2+Cl$ (slow)

Q. The equilibrium molecular structure of $H_2{O}_2$ is:

1. planar
2. linear
3. tetrahedral
4. non-planar, but not tetrahedral
5. cyclic

Q. Gradual addition of $KI$ solution to $Bi(N{O}_3{)}_3$ solution initially produces a dark brown precipitate which dissolves in excess of $KI$ to give a clear yellow solution. Reaction equation is given by :

1. $x=3,y=4$
2. $x=2,y=2$
3. $x=2,y=3$
4. $x=4,y=3$

Q.

1. True
2. False

Q. Which of the following is not correct regarding the adsorption of a gas on the surface of solid?

1. On increasing pressure, adsorption keeps on increasing.
2. Enthalpy and entropy changes are negative.
3. Chemisorption is more specific than physisorption.
4. It is a reversible reaction.

Q.

For the reaction, $H_2\left(g\right)+I_2\left(g\right)\iff$ 2HI(g)\), the equilibrium constant Kp changes when

1. pressure changes

2. catalyst is used

3. adding an inert gas

4. temperature changes

Q. Assertion(A): In the dissociation of $PC{l}_5$ at constant pressure and temperature addition of helium at equilibrum increases the dissociation of $PC{l}_5$.
Reason(R): Helium removes $C{l}_2$ from the field of action.

1. Both Assertion and Reason are true and Reason is correct explanation of Assertion.
2. Both Assertion and Reason are true but Reason is not correct explanation of Assertion.
3. Assertion is true but Reason is false.
4. Both Assertion and Reason are false.

Q. The stable bivalency of $Pb$ and trivalency of $Bi$ is :

1. due to d contraction in $Pb$ and $Bi$
2. due to relativistic contraction of the $6s$ orbitals of $Pb$ and $Bi$, leading to inert pair effect
3. due to screening effect
4. due to attainment of noble liquid configuration

Q. The degree of dissociation of $PC{l}_5$ of decreases with increase in pressure.
If true enter 1, if false enter 0.

Q. 60ml of a mixture of nitrous oxide and nitric oxide was exploded with excess of hydrogen. If 38ml of $N_2$ was formed, calculate the volume of each gas in the mixture.

1. $NO=45ml;N_{2}O=20ml$
2. $NO=20ml;N_{2}O=26ml$
3. $NO=34ml;N_{2}O=22ml$
4. $NO=44ml;N_{2}O=16ml$

Q. A second-order reaction requires $70$ min to change the concentration of reactants from $0.08$ M to $0.01$ M. How much time will it require to become $0.04$ M?

1. $10$ min
2. $20$ min
3. $30$ min
4. $40$ min