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For a chemical reaction it is usually found that the reaction rate is faster at higher temperature. The rate increases because

Athe concentrations of reactants increase
Bmore reactants collide with energy equal to or greater than the activation energy
Cthe concentrations of products increase
Dthe volume expands and there is more room for new compounds (products) to form

Verified Answer :

littlestar

the correct option here is B) more reactants collide with energy equal to or greater than the activation energy...
when the molecules collide with each other due to high temperature they gain kinetic energy and the energy required to start the reaction decreases and reaction starts at lower energy at high rate ...

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