Integrated Rate Law for Zero and First Order Reactions

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Integrated Rate Law for Zero and First Order Reactions: Overview

This topic covers concepts, such as Zero Order Reactions, Integrated Rate Equation for Zero Order Reactions, Time-Concentration Graph for Zero Order Reactions, First Order Reactions, and Integrated Rate Equation for First Order Reactions.

Important Questions on Integrated Rate Law for Zero and First Order Reactions

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A first order reaction is 20% complete in 5 minute. Calculate the time taken for the reaction to be 60% complete:

log 2.5=0.3979, log 1.25=0.0969

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In a first-order reaction, the concentration of reactant decreases from  800  mol/dm  3  to 50  mol/dm  3  in 2 × 102 s. The rate constant of reaction in s-1 is

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For a zero-order reaction, with the initial reactant concentration a, the time for completion of the reaction is:

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Which of the following is incorrect?

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The accompanying figure depicts the change in concentration of species X and Y for the elementary reaction XY as a function of time. The point of intersection of two curves represents:

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The order of a reaction for which a linear line (with a negative slope) is obtained in a graph of log(a-x) vs t is:

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Two-third life for a first-order reaction is 55 minutes. The value of its velocity constant is nearly

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Consider a reaction that is first order in both directions

AkbkfB

Initially only A is present, and its concentration is A0. Assume At and Aeq are the concentrations of A at time "t" and at equilibrium, respectively. The time "t" at which At=A0+Aeq/2 is:

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For a first order reaction RP, the rate constant is k. If the initial concentration of R is R0, the concentration of R at any time 't' is given by the expression:

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The time taken for the completion of three-fourths of a first-order reaction is

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The half-life period for a zero order reaction is equal to:

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 Show that, In a first order reaction, time required for completion of 99.9% is _____ times of half life. (log 10 = 1).

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The half-life period of a zero order reaction A  product is given by:

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A first order reaction has reaction constant, k=5.5×10-14s-1. The half-life of the reaction in seconds is: _____ × 1014 

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The plot of concentration of a reactant vs time for a chemical reaction is shown below.

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The order of this reaction with respect to the reactant is

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A reaction occurs by the following mechanism:
(i) NO2(g)+F2(g)NO2F(g)+F(g)
(ii) F(g)+NO2(g)NO2F(g)
The net reaction is:

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The half life of first order reaction is 6.0 hours. Time  take (in hours) for the concentration of reactant to decrease from 0.8 M to 0.25 M is:

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A first order reaction takes 40 minutes for 20% decomposition. Calculate half life?

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Rate constant of a chemical reaction is 1.72×104 s1. Calculate the order of reaction?

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What is the mathematical relation between half life of zero order reaction and its rate constant.