According to collision theory of reaction rates, the activation energy is

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The energy it should possess so that it can enter into an effective collision.

The energy it has to acquire so that it can enter into an effective collision.

The energy gained by the molecule on colliding with other molecules.

The energy that molecule should possess in order to undergo reaction.

answer is D.

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Detailed Solution

According to collision theory rate of reaction is proportional to the number of collisions per second. And all the collision will not result in formation of product. Only those collision where molecules have enough activation energy and proper orientation will lead to a chemical reaction.

Therefore, the correct option is (D).

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