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At a certain temperature, the first order rate constant k1 is found to be smaller than the second order rate constant k2. If the Ea (1) of the first order reaction is greater then Ea (2) of the second order reaction, then as temperature is raised:

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Important Questions on Chemical Kinetics

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For a first-order gas-phase reaction:

A(g)2B(g)+C(g)

Po be initial pressure of A and Pt the total pressure at time 't', Integrated rate equation is:

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Assertion: Two different reactions can never have same rate of reaction.

Reason: Rate of reaction always depends only on frequency of collision and Arrhenius factor.

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Select the rate law that corresponds to the data shown for the following reaction:

A+BC

Expt. No. (A) (B) Initial Rate
1 0.012 0.035 0.10
2 0.024 0.070 0.80
3 0.024 0.035 0.10
4 0.012 0.070 0.80

 

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Assertion: If the activation energy of a reaction is zero, the temperature will have no effect on the rate constant.

Reason: Lower the activation energy, faster is the reaction.

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A reaction which is of the first order with respect to a reactant A, has a rate constant of 6 min-1. If we start with [A]=0.5 mol L-1, when would [A] reach the value of 0.05 mol L-1?

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Half lives of a first order and a zero order reactions are same. Then the ratio of the initial rates of first order reaction to that of the zero order reaction is
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If the rate of decomposition of N2O5 during a certain time internal is 2.4×10-4 mol L-1 min-1

N2O52NO2+12O2

What are the rates of formation of NO2 and O2 mol L-1  min-1 ?
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In the reaction, A product, -dAdt=K1A. If we start with 10 M of A, then after one natural life time, concentration of A decreased to