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For the reaction \( A \stackrel{\mathrm{k}_{1} \mathrm{sec}^{-1}}{\underset{\mathrm{k}_{2} \mathrm{sec}^{-1}}{\rightleftharpoons}} B \) following graph is given, \( \mathrm{k}_{1}=4 \times 10^{-2} \sec ^{-1} \). Which is/are correct statement(s) \( (\ln 2= \) \( 0.7, \ln 8 / 7=0.14) \)
(a) Equilibrium constant is 4.0
(b) Time taken for the completion of \( 50 \% \) of equilibrium conc. of \( \mathrm{B} \) is \( 14 \mathrm{sec} \).
(c) Time taken for the completion of \( 10 \% \) of initial conc. of \( \mathrm{A} \) is \( 2.8 \mathrm{sec} \).
(d) Rate of constant of backward reaction is \( 10^{-2} \mathrm{sec}^{-1} \)
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