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3A → B + C, it would be a zero order reaction when

1. the rate of reaction is proportional to square of concentration of A
2. the rate of reaction remains same at any concentration of A
3. the rate remains unchanged at any concentration of B and C
4. the rate of reaction doubles if concentration of B is increased to double

Correct answer: the rate of reaction remains same at any concentration of A

Solution

A zero-order reaction means the rate is independent of the concentration of reactants. Thus, the rate remains constant regardless of the concentration of A.

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