Chemical Kinetics

ABC26PH0017 · For a reaction, the rate constant k at 27°C was found to be k=5.4×1011 e-50. The activation energy of the reaction is: · DEC 2011 self-practice

ABC26PH0885 · For a reaction, the rate constant k at 27° C was found to be k=5.4 × 1011 e-50. The activation energy of the reaction is: · JUNE 2012 self-practice

ABC26PH0886 · The rate law for one of the mechanism of the pyrolysis of CH3 CHO at 520° C and 0.2 bar is Rate =- |k2 (k1/2 k1)1 / 2 | [CH3 CHO]3 / 2 The… · JUNE 2012 self-practice

ABC26PH0667 · For a reaction, the rate constant at 25°C is doubled when the temperature is raised to 45°C. The activation energy (in kJ mol-1) of the… · 2001-2022 self-practice

ABC26PH0894 · The activation energy for the bimolecular reaction A+BC → AB+C is E0 in the gas phase. If the reaction is carried out in a confined volume… · DEC 2012 self-practice

ABC26PH0677 · For the formation of B from A, heat liberated is 20 kJ mol-1. If the activation energy for the reaction B → A is 100 kJ mol-1, then the… · 2001-2022

ABC26PH0027 · A first order gaseous reaction is 25% complete in 30 minutes at 227°C and in 10 minutes at 237°C. The activation energy of the reaction is… · DEC 2013

ABC26PH0906 · A first order gaseous reaction is 25% complete in 30 minutes at 227 oC and in 10 minutes at 237° C. The activation energy of the reaction… · DEC 2013 self-practice

ABC26PH0682 · The rate of a chemical reaction doubles when the temperature is changed from 300 K to 310 K. Calculate activation energy in kJ mol-1 · 2001-2022 self-practice

ABC26PH0031 · For a gaseous reaction, 2 NO(g)+Cl2(g) → Non-linear T.S. → 2 NOCl, the pre-exponential factor in the rate constant is proportional to · DEC 2014 self-practice

ABC26PH0913 · For a gaseous reaction, 2 NO(g)+Cl2(g) → Non-linear T.S. → 2 NOCl the pre-exponential factor in the rate constant is proportional to · DEC 2014 self-practice

ABC26PH0915 · A reaction A+B+C → D follows the mechanism A+B ⇌ AB AB+C → D in which first step remains essentially in equilibrium. If Delta H is the… · DEC 2014 self-practice

ABC26PH0033 · The temperature-dependence of a reaction is given by k=A T2 exp (-E0 / R T) The activation energy Ea of the reaction is given by: · JUNE 2015 self-practice

ABC26PH0917 · The temperature-dependence of a reaction is given by k=AT2 exp (-E0 / RT) The activation energy Ea of the reaction is given by: · JUNE 2015 self-practice

ABC26PH0922 · According to transition state theory, the temperature-dependence of pre-exponential factor (A) for a reaction between a linear and a… · JUNE 2015 self-practice

ABC26PH0934 · For a reaction with an activation energy of 49.8 kJ mol-1, the ratio of the rate constants at 600 K and 300 K, (k600 / k300), is… · DEC 2016 self-practice

ABC26PH0043 · For two reactions X(g)+Y(g) → Z(g) (1) M(g)+N(g) → P(g) (2) according to the collision theory, the ratio of squares of pre-exponential… · DEC 2016

ABC26PH0937 · For two reactions X(g)+Y(g) → Z(g) (1) M(g)+N(g) → P(g) (2) according to the collision theory, the ratio of squares of pre-exponential… · DEC 2016 self-practice

ABC26PH0939 · If the pre-exponential factor in Arrhenius equation is 1.6 × 1012 s-1, the value of the rate constant at extremely high temperature will be… · JUNE 2017 self-practice

ABC26PH0943 · Arrhenius equations for two chemical reactions are: k1=A1 e^-E1 / RT, k2=A2 e^-E2 / RT. If E1>E2 then at a given temperature T · JUNE 2017 self-practice

ABC26PH0470 · A gaseous sample on exposure to total radiant energy of 6.626 J at 300 nm results in the photodissociation of 10-3 mol of this sample… · 2005-2021

ABC26PH0471 · A reaction follows second order rate law, -d[A] / dt=k[A]2, if · 2005-2021

ABC26PH0013 · The concentration of a reactant undergoing decomposition was 0.1,0.08 and 0.067 mol L-1 after 1.0,2.0 and 3.0 hr respectively. The order of… · JUNE 2015

ABC26PH0472 · Consider an exothermic reaction A k-1k1⇌ I as the temperature increases · 2005-2021 self-practice

ABC26PH0653 · For the reaction, Q+R k-1k1⇌ X k2 P k1=2.5 × 105 L mol-1 s-1, k-1=1.0 × 104 s-1 and k2=10 s-1. Under steady state approximation, the rate… · 2001-2022 self-practice

ABC26PH0878 · The concentration of a reactant undergoing decomposition was 0.1, 0.08 and 0.067 mol L-1 after 1.0, 2.0 and 3.0 hr respectively. The order… · DEC 2011 self-practice

ABC26PH0014 · At any temperature for the following reaction (D and T are deuterium and tritium respectively) correct statement is: (A) HCl+F → HF+Cl, (B)… · DEC 2011

ABC26PH0473 · One gram of 90 Sr gets converted to 0.953 g after 2 years. The half life of 90 Sr, and the amount of 90 Sr remaining after 5 years are · 2005-2021

ABC26PH0654 · The intensity of a monochromatic visible light is reduced by 90% due to absorption on passing through a 5.0 mM solution of a compound. If… · 2001-2022 self-practice

ABC26PH0879 · At any temperature for the following reaction (D and T are deuterium and tritium respectively) correct statement is: (A) HCl+F → HF+Cl, (B)… · DEC 2011

ABC26PH0015 · An example of a relaxation method of measuring rates is: · DEC 2011

ABC26PH0474 · A reaction proceeds through the formation of an intermediate B in an unimolecular reaction A ka B kb C The integrated rate law for this… · 2005-2021

ABC26PH0655 · Elemental analysis of an organic compound containing C, H and O gives percentage composition: C: 39.9% and H: 6.7%. If the molecular weight… · 2001-2022 self-practice

ABC26PH0880 · An example of a relaxation method of measuring rates is: · DEC 2011 self-practice

ABC26PH0475 · If ka kb, then concentration vs. time plot for the above reaction is: 1 · 2005-2021 self-practice

ABC26PH0338 · Which of the following statements is NOT correct for a catalyst? · 2005-2021

ABC26PH0339 · The value of the rate constant for the gas phase reaction 2 NO2+F2 → 2 NO2 F is 38 dm3 mol-1 s-1 at 300 K. The order of the reaction is · 2005-2021

ABC26PH0658 · The turnover frequency (TOF) for the catalytic reaction, A(1 mol) [ 5 hours] Catalyst (0.01 mol) B with 90% yield of the product is ____… · 2001-2022 self-practice

ABC26PH0340 · For the reaction P+Q+R → S, experimental data for the measured initial rates is given below. The order of the reaction with respect to P, Q… · 2005-2021

ABC26PH0659 · (being typed) · 2001-2022

ABC26PH0884 · Observe the following aqueous solutions of same compound. All the measurements are made at same wavelength and same temperature. Solution… · JUNE 2011 self-practice

ABC26PH0341 · Sucrose is converted to a mixture of glucose and fructose in a pseudo first order process under alkaline condi tions. The reaction has a… · 2005-2021

ABC26PH0660 · The vapour pressure of benzene is 5333 Pa at 7.6° C and 53330 Pa at 60.6° C. Calculate the heat of vapourization of benzene and the normal… · 2001-2022 self-practice

ABC26PH0342 · The reaction, 2NO(g)+O2(g) → 2NO2(g) proceeds via the following steps NO+NO ka N2O2 N2O2 ka' NO+NO N2O2+O2 kb NO2+NO2 The rate of this… · 2005-2021

ABC26PH0661 · A mixture of C3 H8 and oxygen in 1 L closed vessel has an internal pressure of 4 atm at 100° C. When the mixture is ignited, the reaction… · 2001-2022 self-practice

ABC26PH0343 · The rate constant of two reactions as temperature T are k1(T) and k2(T) and the corresponding activation energies are E1 and E2 with E2>E1… · 2005-2021

ABC26PH0662 · An aqueous solution containing 1 g L-1 of a polymer exerts osmotic pressure of 4 torr at 300 K. Given R=0.082 L atm, the molar mass (g… · 2001-2022 self-practice

ABC26PH0344 · For the reaction 2 X3=3 X2, the rate of formation of X2 is: · 2005-2021

ABC26PH0888 · One of the assumptions made in the conventional activated complex theory is: · JUNE 2012

ABC26PH0345 · In a homogeneous catalytic reaction, 1.0 M of a substrate and 1.0 mu M of a catalyst yields 1.0 mM of a product in 10 seconds. The turnover… · 2005-2021