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In a reaction A ->B threshold energy of the reactant is 120 kJ mole–1 and the normal energy of the reactant is 20 kJ mole–1 what is the activation energy barrier of the reaction A ->B.
In a 1st order reaction, the fraction of molecules at 450ºC having sufficient energy (or fraction of effective collisions) is 1.92 × 10–16. What is activation energy value of this reaction?
The role of a catalyst is to change
In the graph shown below ‘I’ means
Energy of activation of an exothermic reaction is
The temperature dependence of the rate constant k is expressed as a E RT k Ae When a plot between log k and 1/T is plotted we get the graph as shown. What is the value of slope in the graph? (a) a E RT (b) a E 2.303…
What will happen, on increasing the temperature or decreasing the activation energy (answer on the basis of Arrhenius equation)?
In the Arrhenius equation, a E /RT k Ae , the factor a E /RT e corresponds to the
On the basis of Arrhenius equation mentioned in Above ques. consider the following statements. I.Ea is activation energy. II.Unit of Ea is J mol-1 III.R is gas constant. Which of these are true statements?
In Arrhenius equation mentioned in Above Ques. ‘A’ is
The correct form of Arrhenius equation is (a) a E /RT k Ae (b) a RT/E k Ae (c) a E /RT k Ae (d) a RT/E k Ae
The rate constant of a reaction is given by ln k (sec–1) = 14.34 – (1.25 × 104)/T What will be the energy of activation?
The rate of reaction is doubled for every 10ºC rise in temperature. The increase in rate as result of increase in temperature from 10ºC to 100ºC is
For a chemical reaction with rise in temperature by 10oC, the rate constant is nearly …A…, Here, A refers to
Most of the chemical reactions are accelerated by …A… in temperature. Here, A refers to
The initial concentration of N2O5 in the following order reaction, N O g 2NO g g -> was 1.24 10 molL x at 318 K. The concentration of N2O5 after 60 min was 0.20 × 10-2 mol L-1. Calculate the rate constant of the…
Consider some facts about decomposition of H2O2. I.It is catalyzed by iodide ion in acidic or alkaline medium. II.It is second order reaction with respect to both H2O2 and I- III.Rate equation of this particular react…
Half-life a reaction is found to be inversely proportional to the cube of its initial concertration. Order of reaction is
For a homogeneous gaseous reaction, A B C D, -> in the initial pressure was P0 while pressure after time t was P. Expression for rate constant K in terms of P0, P and t is: (a) 2P 2.303 K log t 3P P (b) 4P…
Which of the following is not similar between a first order and pseudo first order reaction?
The rate law for inversion of cane sugar is R=k [C12H22O11][H2O]. Find the concentration of sucrose if the rate of the reaction is 0.032 s-1 and rate constant k=0.005.
The rate constant ‘k for pseudo first order reaction is (a) 2.303log C C t (b) 2.303 C log t C (c) 2.303log C C t (d) C 2.303log t C Ans. (d) Sol. The rate constant ‘k’ for pseudo first order reaction is C 2.303log …
Pseudo order reaction A B C (a) (b) (c) (d)
First order reaction C. Thermal decomposition of HI on gold surface
Match the terms of Column I with Column II and choose the correct option from the codes given below. Column I Column II A. Inversion of cane sugar 1. Zero order reaction B. Decomposition of N2O5