The minimum energy level required for an effective collision is called _________(threshold/collision) energy.

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Solution

The minimum energy level required for an effective collision is called threshold energy. Thus, all those collisions in which the colliding molecules possess energy less than threshold energy will not give products.

Thus, these collisions will not be fruitful. Only those collisions will be fruitful in which the colliding molecules have energy equal to or greater than threshold energy.

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