JEE Questions for Chemistry Chemical Kinetics Quiz 12 - MCQExams.com

If k1 = rate constant at temperature T1 and k2 = rate constant at temperature T2 for a first order reaction, then which of the following relations is correct ?
(Ea : activation energy)

  • Chemistry-Chemical Kinetics-1979.png
  • 2)
    Chemistry-Chemical Kinetics-1980.png

  • Chemistry-Chemical Kinetics-1981.png

  • Chemistry-Chemical Kinetics-1982.png
For a reversible reaction, A ⇌B,
which one of the following statements is wrong from the given energy profile diagram ?
Chemistry-Chemical Kinetics-1984.png
  • Activation energy of forward reaction is greater than backward reaction
  • The forward reaction is endothermic
  • The threshold energy is less than that of activation energy
  • The energy of activation of forward reaction is equal to the sum of heat of reaction and the energy of activation of backward reaction
For the two gaseous reactions, following data are given
Chemistry-Chemical Kinetics-1986.png
  • 400 K
  • 1000 K
  • 800 K
  • 1500 K
  • 500 K

Chemistry-Chemical Kinetics-1988.png
  • Lowering of Ea
  • Lowering of P
  • Lowering of Z
  • Independent of all the above factors
According to Arrhenius equation, the rate constant (k) is related to temperature (T ) as

  • Chemistry-Chemical Kinetics-1990.png
  • 2)
    Chemistry-Chemical Kinetics-1991.png

  • Chemistry-Chemical Kinetics-1992.png

  • Chemistry-Chemical Kinetics-1993.png

Chemistry-Chemical Kinetics-1995.png

  • Chemistry-Chemical Kinetics-1996.png
  • 2)
    Chemistry-Chemical Kinetics-1997.png
  • k vs T

  • Chemistry-Chemical Kinetics-1998.png
Temperature dependent equation can be written as
  • ln k = ln A - eEa/RT
  • ln k = ln A + eEa/RT
  • ln k = ln A - eRT/Ea
  • None of these
For an endothermic reaction, where ∆H represents the enthalpy of the reaction in kJ/mol, the minimum value for the energy of activation will be
  • less than ∆H
  • zero
  • more than ∆H
  • equal to ∆H

Chemistry-Chemical Kinetics-2007.png

  • Chemistry-Chemical Kinetics-2008.png
  • 2)
    Chemistry-Chemical Kinetics-2009.png

  • Chemistry-Chemical Kinetics-2010.png

  • Chemistry-Chemical Kinetics-2011.png
Which one of the following equation is correct for the reaction:
N2(g) + 2H2(g) → 2NH3(g)

  • Chemistry-Chemical Kinetics-2013.png
  • 2)
    Chemistry-Chemical Kinetics-2014.png

  • Chemistry-Chemical Kinetics-2015.png

  • Chemistry-Chemical Kinetics-2016.png

Chemistry-Chemical Kinetics-2018.png

  • Chemistry-Chemical Kinetics-2019.png
  • 2)
    Chemistry-Chemical Kinetics-2020.png

  • Chemistry-Chemical Kinetics-2021.png

  • Chemistry-Chemical Kinetics-2022.png
For a chemical reaction 2X + Y → Z, the rate of appearance of Z is 0.05 molL-1 per min. The rate of disappearance of X will be
  • 0.05 mol L-1 per hour
  • 0.05 mol L-1 per min
  • 0.1 mol L-1 min-1
  • 0.25 mol L-1 per min

Chemistry-Chemical Kinetics-2025.png
  • 4 mm min-1
  • 8 mm min-1
  • 16 mm min-1
  • 2 mm min-1
The rate of a gaseous reaction is equal to k [A][B]. The volume of the reaction vessel containing these gases is suddenly reduced to one-fourth of the initial volume. The rate of the reaction would be
  • 1/16
  • 16/1
  • 1/8
  • 8/1
The rate law for a reaction between the substances A and B is given by Rate =k [A]n[B]n. On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as
  • m + n
  • (n – m)

  • Chemistry-Chemical Kinetics-2027.png

  • Chemistry-Chemical Kinetics-2028.png
The following data are for the decomposition of ammonium nitrite in aqueous solution
Chemistry-Chemical Kinetics-2030.png
  • Zero
  • One
  • Two
  • Three
The following kinetic data are provided for a reaction between A and B:
Chemistry-Chemical Kinetics-2032.png

  • Chemistry-Chemical Kinetics-2033.png
  • 2)
    Chemistry-Chemical Kinetics-2034.png

  • Chemistry-Chemical Kinetics-2035.png

  • Chemistry-Chemical Kinetics-2036.png
SO2Cl2 → SO2 + Cl2 is a first order gas reaction with k = 2.2 × 10–5 sec–1 at 320oC. The percentage of SO2Cl2 decomposed on heating for 90 minutes is
  • 1.118
  • 0.1118
  • 18.11
  • 11.18
A substance ‘A’ decomposes in solution following the first order kinetics. Flask I contains 1 L of 1 M solution of A and flask II contains 100 ml of 0.6 M solution. After 8 hr, the concentration of A in flask I becomes 0.25 M. What will be time for concentration of A in flask II to become 0.3 M?
  • 0.4 hr
  • 2.4 hr
  • 4.0
  • unpredictable as rate constant is not given
If a is the initial concentration and k is the rate constant of a zero order reaction, the time for the reaction to go to completion will be
  • k/a
  • a/k
  • a/2k
  • k/2a
The activation energy of a reaction is 58.3 kJ mol-1. The ratio of the rate constants at 305 K and 300 K is about (R = 8.3 JK-1 mol-1)
  • 1.25
  • 1.50
  • 1.75
  • 2.0
The hydrolysis of ethyl acetate was carried out separately with 0.05 M HCl and 0.05 M H2SO4. The rate constants were found to be k1 and k2 respectively. Then
  • k1 = k2
  • k1 > k2
  • k1 < k2
  • k2 = 2 k1
A certain reaction A + B → P is of first order with respect to each reactant. If [A]0 =0.1 M, [B]0 = 5.0 M and the second order rate constant k is 6 × 10–3 M–1s–1the half-life of the reaction in seconds is
  • 23.5
  • 27.7
  • 33.3
  • 115.5
Consider the following statements: The rate law for the acid catalysed hydrolysis of an ester being given as Rate = k [H+] [ester] = k’ [ester]. If the acid concentration is doubled at constant ester concentration
1. the second order rate constant, k is doubled
2. the pseudo first order rate constant, k is doubled
3. the rate of the reaction is doubled.
Which of the above statements are correct?
  • 1 and 2
  • 2 and 3
  • 1 and 3
  • 1, 2 and 3
2A + B → 3C for the reaction instant rate of reaction is...

  • Chemistry-Chemical Kinetics-2043.png
  • 2)
    Chemistry-Chemical Kinetics-2044.png

  • Chemistry-Chemical Kinetics-2045.png

  • Chemistry-Chemical Kinetics-2046.png
For the reaction of 4A + B → 2C + D. Which of the following statement is not correct ?
  • The rate of formation of C and D are equal
  • The rate of formation of D is one half the rate of consumption of A
  • The rate of appearance of C is one half the rate of disappearance of B
  • The rate of disappearance of B is one fourth of the rate of disappearance of A

Chemistry-Chemical Kinetics-2049.png

  • Chemistry-Chemical Kinetics-2050.png
  • 2)
    Chemistry-Chemical Kinetics-2051.png

  • Chemistry-Chemical Kinetics-2052.png

  • Chemistry-Chemical Kinetics-2053.png
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Chemistry Quiz Questions and Answers