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JIPMER 2013
Exam
JIPMER
Year
2013
Subject
Chemistry
Chapter
Chemical Equilibrium

JIPMER 2013 · Chemistry · Chemical Equilibrium

The value of K_c for the reaction, 2 A leftharpoons B+C is 2 × 10^...

The value of KcK_c for the reaction, 2A⇌B+C2 A \rightleftharpoons B+C is 2×10−32 \times 10^{-3}. At a given time, if the composition of reaction mixture is [A]=[B]=[C]=3×10−3M[A]=[B]=[C]=3 \times 10^{-3} \mathrm{M}. Which is true?

Options

  1. AThe reaction will proceed in forward direction
  2. BThe reaction will proceed in backward direction
  3. CThe reaction will proceed in any direction
  4. DNone of the above

Correct answer

B. The reaction will proceed in backward direction

Step-by-step solution

Reaction quotient, QC=[B][C]/[A]2Q_C=[B][C] /[A]^2 as as [A]=[B]=[C]=3×10−4M[A]=[B]=[C]=3 \times 10^{-4} \mathrm{M} QC=Q_C=\left(3 \times 10^{-4}\right) \times(3×10−4)/(3×10−4)2=1\left(3 \times 10^{-4}\right) /\left(3 \times 10^{-4}\right)^2=1 As QC>KcQ_C \gt K_c, so the reaction will proceed in the reverse direction.
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