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For a chemical reaction, AB, it is observed that the rate of reaction doubles when the concentration of A is increased four times. The order of reaction in A is :

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Important Questions on Chemical Kinetics

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For the reaction 2NO2N2O2+O2, rate expression is as follows -dNO2dt=KNO2n, where K=3×10-3 mol- 1L sec-1. If the rate of formation of oxygen is 1.5×10-4 mol L-1 min-1 then the molar concentrations of NO2 in mole L-1 is
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A first order reaction is 75% completed in 100 minutes. How long time will it take for it’s 87.5% completion?
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In the following reaction  AB + C , rate constant is 0.001 Ms-1 . If we start with 1 M of Athencone, of A and B after 10 minutes are respectively :

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Rate constant k =2.303 min1 for a particular reaction. The initial concentration of thereaction is 1 mol/litre then rate of reaction after 1 inute is:

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The decomposition of N2O into N2 and O2 in the presence of gaseous argon follows second order kinetics with 

k=5.0×1011L, mol-1s-1 e-29000(k)/T

Hence, Ea (energy of activation) is:

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A hypothetical reaction A2+B22AB follows the mechanism as given below:

A2A+A (fast)
A+B2AB+B (slow)
A+BAB (fast)

The order of the over all reaction is:

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A radioactive element has a half-life of one day. After three days the amount of the element left will be:
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If standard heat of dissociation of PCl5 is 230 Cal, then the slope of the graph of log K vs 1T is