Question

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

• A. is zero
• B. decreases with time
• C. is independent of time
• D. increases with time

Answer 1

Answer: (D)

increases with time

Answer 2

$A + B \rightleftharpoons \, C + D$
\hspace30mm $Q = \frac{ [ C ] \, [ D ] }{ [ A ] \, [ B ] }$
As time passes, amount of products 'C' and 'D' increases,
hence Q increases.