Question

For a reversible reaction, $A + B {\rightleftharpoons}C+D$, the graph for rate of reaction with time is given below.
Mark the terms $(p), (q)$ and $(r)$.

• A. $(p)$-rate of backward reaction, $(q)$-rate of forward reaction, $( r )$ -equillibrium
• B. $(p)$-rate of forward reaction, $(q)$-rate of backward reaction, $(r)$-equilibrium
• C. $(p)$-concentration of products, $(q)$- concentration of reactants, (r)-rate of reaction
• D. $(p)$-instantaneous rate of reaction, $(q)$-variation of rate, $(r)$-average rate of reaction

Answer 1

Answer: (B)

Rate of forward reaction decreases and rate of backward reaction increases with passage of time. At equilibrium both the rates become equal.