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Le-chatelier principle is applicable
 A. Both physical and chemical equilibrium
B. Only for chemical equilibrium
C. Only for physical equilibrium
D. Neither for B nor for C

Answer
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Hint: Le-Chatelier’s principle is applicable whenever a change in one of the variables that describe a system at equilibrium will shift towards the side that counteracts the effect of change. Here these variables are concentration, pressure or volume, and temperature.

Complete answer:
Thus, option (A) is correct.

Note: Le-Chatelier’s principle cannot be applied to pure solids and liquids. This is because they feel a negligible change in concentration during the equilibrium process. If we are adding or removing them from a reaction system at equilibrium there is no effect on the equilibrium state.