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Introduction to Reversible and Irreversible Reactions

The reactions...

Question

The reactions $P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)$ and $C O C l_{2} (g) ⇌ C O (g) + C l_{2} (g)$ are simultaneously in equilibrium at constant volume. A few moles of $C O (g)$ are introduced into the vessel. After some time, the new equilibrium concentration of

A

P C l_{5} will remain unchanged

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B

C l_{2} will be greater

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C

P C l_{5} will become less

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D

P C l_{5} will become greater

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Solution

The correct option is C $P C l_{5} will become less$
When $C O$ is added to the above system, the second reaction will go backwards in accordance with Le Chatelier's principle and hence, the concentration of the common molecule, i.e. $C l_{2}$ will also reduce.
So, to counter the decreased concentration of chlorine, first equilibrium will go forward and hence, the concentration of $P C l_{5}$ will decreased.

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Similar questions

Q. The reactions

P C l_{5} ⇌ P C l_{3} (g) + C l_{2} (g)

C O C l_{2} (g) ⇌ C O (g) + C l_{2} (g)

are simultaneously in equilibrium at constat volume. A few moles of CO(g) are introduced into the vessel. After some time, the new equlibrium concentration of:

Q. The reactions

P C l_{5} (g) ⇌ P C l_{3} (g) + {C l}_{2} (g) a n d C O C l_{2} (g) ⇌ C O (g) + {C l}_{2} (g)

are simultaneously in equilibrium at constant volume. A few moles of

C o (g)

are introduced into the vessel. After some time, the new equilibrium concentration of:

Q. Two systems,

P {C l}_{5} (g) ⇌ P {C l}_{3} (g) + {C l}_{2} (g)

C O {C l}_{2} (g) ⇌ C O (g) + {C l}_{2} (g)

are simultaneously in equilibrium in a vessel at constant volume. If some

C O (g)

is introduced in the vessel at constant volume, then at new equilibrium, the concentration of:

Q. Two systems,

P C l_{5 (g)} ⇌ P C l_{3 (g)} + C l_{2 (g)}

C O C l_{2 (g)} ⇌ C O_{(g)} + C l_{2 (g)}

are simultaneously in equilibrium in a vessel at constant volume. If some

C O

is introduced into the vessel then at the new equilibrium, the concentration of :

Q. Following two equilibrium is simultaneously established in a container:

P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)

C O (g) + C l_{2} (g) ⇌ C O C l_{2} (g)

If some Ni(s) is introduced in the container forming

N i (C O)_{4}

(g), then at new equilibrium:

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