The activation energy for a simple chemical reaction, $A \to B$ is $E_{a}$ in forward direction. The activation energy for reverse reaction.
[CBSE AIPMT 2003]

Can be less than or more than

E_{a}

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Is always double of

E_{a}

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Is negative of

E_{a}

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Is always less than

E_{a}

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Solution

The correct option is A Can be less than or more than $E_{a}$
The energy of activation of reverse reaction is less than or more than energy of activation $(E_{a})$ of forward reaction.
$∴ Δ H = (E_{a})_{F} - (E_{a})_{R}$
Because it depends upon the nature of reaction.
If $(E_{a})_{F} > (E_{a})_{R}$ , reaction is endothermic
or $(E_{a})_{F} < (E_{a})_{R}$ , reaction is exothermic

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The activation energy for a simple chemical reaction, A→B is Ea in forward direction. The activation energy for reverse reaction. [CBSE AIPMT 2003]

The activation energy for a simple chemical reaction, $A \to B$ is $E_{a}$ in forward direction. The activation energy for reverse reaction.
[CBSE AIPMT 2003]