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
• B. Le-Chatelier's principle
• C. Ostwald's Rule
• D. None of the above

Answer 1

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.