ABC26PH0017 · (being typed) · DEC 2011self-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 2012self-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 (k12 k1 )1 / 2 | [CH3 CHO ]3 / 2 The… · JUNE 2012self-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… · 2001-2022self-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 of… · DEC 2012self-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 and in 10 minutes at 237. 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 2013self-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 · 2001-2022self-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 2014self-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 2014self-practice
ABC26PH0915 · A reaction A+B+C D follows the mechanism arrayl A+B AB \\ AB+C D array in which first step remains essentially in equilibrium. If Delta H… · DEC 2014self-practice
ABC26PH0033 · The temperature-dependence of a reaction is given by k=A T2 (-E0 / R T ) The activation energy Ea of the reaction is given by: · JUNE 2015self-practice
ABC26PH0917 · The temperature-dependence of a reaction is given by k=AT2 (-E0 / RT ) The activation energy Ea of the reaction is given by: · JUNE 2015self-practice
ABC26PH0922 · According to transition state theory, the temperature-dependence of pre-exponential factor (A) for a reaction between a linear and a… · JUNE 2015self-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 2016self-practice
ABC26PH0043 · For two reactions arrayll X(g)+Y(g) Z(g) & (1) \\ M(g)+N(g) P(g) & (2) array according to the collision theory, the ratio of squares of… · DEC 2016
ABC26PH0937 · For two reactions arrayll X(g)+Y(g) Z(g) & (1) \\ M(g)+N(g) P(g) & (2) array according to the collision theory, the ratio of squares of… · DEC 2016self-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 2017self-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 2017self-practice
Chemical Kinetics – General
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
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… · 2001-2022self-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 2011self-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
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… · 2001-2022self-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
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… · 2001-2022self-practice
ABC26PH0880 · An example of a relaxation method of measuring rates is: · DEC 2011self-practice
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 ____… · 2001-2022self-practice
ABC26PH0884 · Observe the following aqueous solutions of same compound. All the measurements are made at same wavelength and same temperature. Solution… · JUNE 2011self-practice
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… · 2001-2022self-practice
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… · 2001-2022self-practice
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… · 2001-2022self-practice
ABC26PH0888 · One of the assumptions made in the conventional activated complex theory is: · JUNE 2012
ABC26PH0664 · Addition of 1.0 g of a compound to 10 g of water increases the boiling point by 0.3 C. The amount of compound needed to prepare a 500 ml or… · 2001-2022self-practice
ABC26PH0889 · The quantitative determination of N2 H4 with KIO3 proceeds in a mixture of H2 O / CCl4 as Follows N2 H4+KIO3+2 HCl N2+KCl+ICl+3 H2 O The… · JUNE 2012self-practice
ABC26PH0018 · The carbon-14 activity of an old wood sample is found to be 14.2 disintegrations min-1\,g-1. Calculate age of old wood sample, if for a… · DEC 2011
ABC26PH0890 · The carbon-14 activity of an old wood sample is found to be 14.2 disintegrations -1 g-1.Calculate age of old wood sample, if for a fresh… · JUNE 2012self-practice
ABC26PH0019 · "Phosphorescence" is represented as · DEC 2011
ABC26PH0666 · A 2.5 10-4 M solution of a complex exhibits an absorption maximum at 625 nm with an absorbance of 0.90 when measured in a cuvette with a… · 2001-2022self-practice
ABC26PH0891 · "Phosphorescence" is represented as · JUNE 2012self-practice
ABC26PH0020 · Using cuvettes of 0.5\,cm path length, a 10-4\,M solution of a chromophore shows 50\% transmittance at certain wave length. The molar… · DEC 2011
ABC26PH0892 · Using cuvettes of 0.5 cm path length, a 10-4 M solution of a chromophore shows 50 \% transmittance at certain wave length. The molar… · JUNE 2012self-practice
ABC26PH0668 · An aqueous solution of hemoglobin has a molar absorptivity value of 18,600\,L\,mol-1\,cm-1 for an absorbance value of 0.1 at 540 nm (Given… · 2001-2022
ABC26PH0670 · For a particular reaction at constant temperature, a plot of inverse of reactant concentration (1/([A]) ) versus time is a straight line… · 2001-2022self-practice
ABC26PH0022 · In atom recombination reactions · DEC 2012self-practice
ABC26PH0671 · A solution containing 250 ppm of CuSO4 5 H2 O (formula weight =250 ) has an absorbance of 0.1 measured in 1 cm cell at 600 nm . Calculate… · 2001-2022self-practice
ABC26PH0896 · In atom recombination reactions · JUNE 2013self-practice