For a reaction A K1 → B k2 → C If the rate of formation of B is set to be zero then the concentration of B is given by :

Question

For a reaction \(A \xrightarrow {K_1} B \xrightarrow {K_2} C\)

If the rate of formation of B is set to be zero then the concentration of B is given by :

(1) \(K_1K_2 [A]\)

(2) \((K_1 -K_2)[A]\)

(3) \((K_1 + K_2)[A]\)

(4) \((K_1/K_2)[A]\)

Answer 1

Correct option is (4) \((K_1/K_2)[A]\)

Rate of formation of B is

\(\frac {d[B]}{dt} = k_1 [A]- k_2 [B]\)

\(0 = k_1 [A]- k_2 [B]\)

\(\left(\frac {k_1}{k_2}\right) [A] = [B]\)