When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change. This is called the

A Le-Chatelier principle
B Kopp's rule
C Law of corresponding state
D Arrehenius hypothesis

Correct Answer: Le-Chatelier principle

Le Chatelier's principle states that a system will react to a change (disturbing the equilibrium) in such a way that it minimizes the change.

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What is the shortcut key to "Undo" the last action in a document?
একবার Delete হয়ে গেলে আর Undo করা যায় না কোনটিকে? 

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