For the reaction, 2 A→B. rate =k[A]²,
if concentration of reactant is doubled, then the
(a) rate of reaction will be double.
(b) rate constant will remain unchanged, however rate of reaction is directly proportional to the rate constant.
(c) rate constant will change since rate of reaction and rate constant are directly proportional to each other.
(d) rate of reaction will increase by four times.
Choose the correct answer from the options given below.

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(a), (b) only

(b), (d) only

(c), (b) only

(a), (c) only

answer is D.

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Detailed Solution

Rate = K[A]²
(d) If the concentration of reactant is doubled, the rate of reaction will increase four times as per the rate
equation.
i.e., rate = K[2A]² rate = 4K[A]²
(b) Rate constant is independent of concentration but temperature dependent. Rate depends on concentration of reactants.

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