A : - Rate of reaction increases with increase in concentration of reactants
R : - Number of effective collisions increases with increase in concentration of reactants

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Both A and R are true and R is not the correct explanation of A

A is false but R is true

Both A and R are true and R is the correct explanation of A

A is true but R is false

answer is A.

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Detailed Solution

As the concentration of reactants increases, the number of molecules per unit volume and the number of effective collisions increase. Consequently the rate of reaction increases.

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