Chemical and Ionic Equilibrium 1 Question 19

20. When two reactants, $A$ and $B$ are mixed to give products, $C$ and $D$, the reaction quotient, $(Q)$ at the initial stages of the reaction

(2000)

(a) is zero

(b) decreases with time

(c) is independent of time

(d) increases with time

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Solution:

  1. $A+B \rightleftharpoons C+D, Q=\frac{[C][D]}{[A][B]}$

As time passes, amount of products ’ $C$ ’ and ’ $D$ ’ increases, hence $Q$ increases.