For an endothermic reaction $X \rightarrow Y$,the activation energies for the forward and backward reactions are $E_f$ and $E_b$ respectively. Then,in general:
- A$E_b > E_f$
- B$E_b < E_f$
- CThere is no fixed relationship between $E_b$ and $E_f$.
- D$E_b = E_f$
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