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For an endothermic reaction, XrarrY. If ...

For an endothermic reaction, `XrarrY`. If `E_f` is activation energy of the forward reaction and `E_r` that for reverse reaction, which of the following is correct ?

A

`E_f=E_r`

B

`E_fltE_r`

C

`E_fgtE_r`

D

`deltaH = E_f-E_r` is negative

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