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
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
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
ABC26PH0342 · The reaction, 2NO(g)+O2(g) 2NO2(g) proceeds via the following steps arrayl NO+NO ka N2O2 \\ N2O2 ka' NO+NO \\ N2O2+O2 kb NO2+NO2 array The… · 2005-2021
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
ABC26PH0344 · For the reaction 2 X3=3 X2, the rate of formation of X2 is: · 2005-2021
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
ABC26PH0346 · For the reaction given below, the relaxation time is 10-6 s. Given that 10 \% of A remains at equilibrium, the value of k1 (s-1 ) is A… · 2005-2021
ABC26PH0347 · The mechanism of enzyme (E) catalysed reaction of a substrate (S) to yield product (P) is: E+S k2k1 [ES] k-2k2 E+P ; (-d[S])/dt=k1… · 2005-2021
ABC26PH0348 · For the parallel first order reaction shown below the value of k 1 is 1 10-4 s-1. If the reaction starts from X , the ratio of the… · 2005-2021
ABC26PH0349 · The half-life (t1 / 2 ) for the hydrolysis of an ester varies with the initial concentration of the reactant ([E]0 ) as follows: The oder… · 2005-2021
ABC26PH0350 · The fluorescene lifetime of a molecule in solution is 10 ns . If the flurosence quantum yield is 0.1 , the rate constant of fluroscene… · 2005-2021
ABC26PH0351 · The overall rate constant (k_ overall ) for the formation of P can be expressed as · 2005-2021
ABC26PH0352 · The overall activation energy (E_A, overall ) for the formation of P can expressed as · 2005-2021
ABC26PH0353 · The specific rate constant of decomposition of compound is represented by k = 5.0 - 12000/T The activation energy of decomposition for this… · 2005-2021
ABC26PH0354 · Statement for Linked Answer Q. 23 and Q. 24: In the mu vs T diagram for different phases of the same substance at one atmospheric pressure… · 2005-2021
ABC26PH0355 · Statement for Linked Answer Q. 23 and Q. 24: In the mu vs T diagram for different phases of the same substance at one atmospheric pressure… · 2005-2021
ABC26PH0356 · For a given first order reaction, the reactant reduces to 1 / 4^ th its initial value in 10 minutes. The rate constant of the reaction is: · 2005-2021
ABC26PH0357 · According to Ehrenfest classification of phase transitions, the above diagram refers to · 2005-2021
ABC26PH0358 · Assuming k3 [O3 ] k2 [O2 ][M], the activation of the overall reaction is · 2005-2021
ABC26PH0359 · Under the steady state approximation for the intermediates, the rate of decomposition of ozone, -d [O3 ]dt, is · 2005-2021
ABC26PH0360 · For a reaction involving two steps given below First step: G 2 H Second step: G+H P assume that the first step attains equilibrium rapidly… · 2005-2021
ABC26PH0361 · Consider the reaction, H2+C2H4 C2H6 The molecular diamesters of H2 and C2H4 are 1.8\, and 3.6\, respectively. The pre-exponential factor in… · 2005-2021
ABC26PH0362 · Consider the reaction, 2 C(s)+O2(g) 2 CO(g) at equilibrium, The equilibrium can be shifted towards the forward direction by · 2005-2021
ABC26PH0364 · For a reaction of the type X k2k1 Y, the correct rate expression is ([X]0 . and [X] corresponds to the concen tration of X at time t=0 and… · 2005-2021
ABC26PH0365 · The temperature dependence of partition are as follows: arrayll qtranslation T3/2 & qvibration T0 \\ qrotation T\,(linear molecule) &… · 2005-2021
ABC26PH0366 · For a gas phase unimolecular reaction at tempeature 298 K , with a pre-exponential factor of 2.17 1013 s-1, the entropy of activation (… · 2005-2021self-practice
ABC26PH0367 · For an elementary bimolecular gas phase reaction, activation energy is 5.5 kJ mol-1. Enthalpy of activation, in kJ mol-1, at 300 K is ____… · 2005-2021
ABC26PH0368 · The reaction, A B, is first order in both the directions. The forward and reverse rate constants are 4.2 10-4 s-1 and 1.04 10-3 s-1… · 2005-2021
ABC26PH0369 · For the following reaction, A+B k-1=104\,s-1k1=105\,L\,mol-1s-1 I k2=10\,s-1 P if steady state approximation can be applied on [I], the… · 2005-2021
ABC26PH0370 · The rate constant of a reaction is 1.25 10-4 mol L-1 s-1. If the initial concentration of the reactant is 0.250 mol L-1, the total time (in… · 2005-2021
ABC26PH0371 · The dependence of rate constant k on a temperature T (in K ) of a reaction is given by the expression k=[(-5000 K) / T]+10 The activation… · 2005-2021
ABC26PH0372 · The major product obtained in the following reaction is · 2005-2021
ABC26PH0373 · Under physiological conditions, the conversion of CO2 to bicarbonate ion by carbonic anhydrase enzyme (MW =30,000 g mol-1 ) has a turnover… · 2005-2021
ABC26PH0374 · According to Eyring state theory for a bimolecular reaction, the activated complex has · 2005-2021
ABC26PH0375 · The rate constant of a first order reaction, X Y, is 1.6 10-1 s-1 at 300 K . Given that the activation energy of the reaction is 28 kJ… · 2005-2021self-practice
ABC26PH0376 · Second-order are constant for the reaction between [Co (NH3 )5 X ]n+ (n=3 . for X=NH3 and H2 O; n = 2 for · 2005-2021
ABC26PH0378 · Consider the following two parallel irreversible first order reactions at temperature T, where k1 and k2 are the rate constants and their… · 2005-2021
ABC26PH0379 · For an enzyme catalyzed reaction, the plot of inverse of initial rate against inverse of initial substrate concentration is linear with… · 2005-2021self-practice
ABC26PH0380 · In a reaction, reactant X is converted to products Y and Z consecutively with rate constants 6.0 10-2 min-1 and 9.0 10-3 min-1… · 2005-2021self-practice
ABC26PH0381 · For the ring opening reaction of cyclopropane to propene at 25 C, the pre-exponential factor is 4.3 1015 s-1. The entropy of activation (in… · 2005-2021self-practice
ABC26PH0382 · The rate constants for the decomposition of a molecule in the presence of oxygen are 0.237 10-4\,L\,mol-1s-1 at 0 and 2.64… · 2005-2021self-practice