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Question

When in any system at equilibrium state pressure, temperature or concentration is changed then the equilibrium will shift in such a direction which neutralizes the effect of change.
This is known as:

A
First Law of Thermodynamics
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B
Le-Chatelier's principle
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C
Ostwald's Rule
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D
None of the above
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Solution

The correct option is B Le-Chatelier's principle
Le-Chatelier's principle: When in any system at equilibrium state pressure, temperature or concentration is changed then the equilibrium will shift in such a direction which neutralizes the effect of change.


Thoery:

Le-Chateliers’s Principle :
Le-Chateliers’s Principle states that :
If an outside influence upsets an equilibrium, the system undergoes a change. This change counteracts the disturbing influence and returns the system to equilibrium.
Outside influences that affects physical and chemical equilibrium are:
Change in the Concentration of reactant and/or product.
Change in the Volume of the system.
Change In the Pressure of system.
Addition of an inert gas.
Change in temperature of the system.

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