For the reaction, 2X3 $$ \rightleftharpoons $$ 3X2, the rate of formation of X2 is
A. $$3\left( {\frac{{ - d\left[ {{X_3}} \right]}}{{dt}}} \right)$$
B. $$\frac{1}{2}\left( {\frac{{ - d\left[ {{X_3}} \right]}}{{dt}}} \right)$$
C. $$\frac{1}{3}\left( {\frac{{ - d\left[ {{X_3}} \right]}}{{dt}}} \right)$$
D. $$\frac{3}{2}\left( {\frac{{ - d\left[ {{X_3}} \right]}}{{dt}}} \right)$$
Answer: Option D

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