MCQ
When in any system at equilibrium state pressure, temperature and concentration is changed then the equilibria shifted to such a direction which neutralize the effect of change. This is known as
  • A
    First law of thermodynamics
  • Le-chatelier's principle
  • C
    Ostwald's rule
  • D
    Hess's law of constant heat summation

Answer

Correct option: B.
Le-chatelier's principle
b
when in any system at equilibrium state pressure, temperature and concentration is changed then the equilibrium shifted to such a direction which neutralize the effect of change. this is known Le-Chatelier's principle

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A study of chemical kinetics of the reaction $A + B \to$  Products, gave the following data at $25\,^oC$.

Exp. No. [A] [B] Rate
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$\begin{array}{*{20}{c}}
{C{H_3} - CH = C - C = CH - C{H_3}}\\
{|\,\,\,\,\,\,\,\,\,|}\\
{\,Br\,\,\,\,Cl}
\end{array}$

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$\begin{array}{*{20}{c}}
  {Ph - CH = CH - CH - C = O\xrightarrow[{PH = 4.5}]{{{H_2}N - OH}}} \\ 
  {{\mkern 1mu} {\mkern 1mu} \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|{\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} {\mkern 1mu} } \\ 
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\end{array}$ ?

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$\begin{array}{*{20}{c}}
  {^{C{H_3}}} \\ 
  {_H} 
\end{array}\begin{array}{*{20}{c}}
  {{\text{ }}\backslash {\text{ }}} \\ 
  / 
\end{array}\mathop C\limits^{} {\mkern 1mu}  = \mathop C\limits^{} {\mkern 1mu} \begin{array}{*{20}{c}}
  / \\ 
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