ONLINE TEST - Chemical Kinetics – II - EM

This Quiz is a Simple test for +2 Science group students which contain Questions asked from March - 2006 to Sept - 2016 in Chemical Kinetics – II. Just participate in it and test your skill.

1. The sum of the powers of the concentration terms that occur in the rate equation is called
molecularity
order
rate
rate constant


2. 50% of a first order reaction is completed in 20 minutes. The time required for 75% completion
60 minutes
10 minutes
40 minutes
80 minutes


3. Decomposition of nitrogen pentoxide in CCl4 is an example for
second order reaction
third order reaction
zero order reaction
first order reaction


4. For a reaction Ea = 0 and k = 4.2 x 10⁵ sec^–1  at 300 K, the value of k at 310 K will be
4.2 x 105 sec–1
8.4 x 105 sec–1
8.4 x 10–5 sec–1
4.2 x 10–5 sec–1


5. For a reaction: aA → bB, the rate of reaction is doubled when the concentration of A is increased by four times. The rate of reaction is equal to
k [A]a
k [A]½
k [A]1/a
k [A]


6. Half-life period of a first order reaction is 20 min. The time taken for the completion of 99.9
20 min
2000 min
250 min
200 min


7. Hydrolysis of an ester by dilute HCl is an example for ______ reaction
zero order
first order
second order
pseudo first order


8. If the activation energy is high then the rate of the reaction is
high
moderate
low
cannot be predicted


9. In a first order reaction the concentration of the reactant is increased by 2 times. The rate of the reaction is increased by
2 times
4 times
10 times
6 times


10. Reactions in which the reacting molecules react in more than one way yielding different set of products are called
consecutive reactions
parallel reactions
opposing reactions
chain reactions


11. The excess energy which a molecule possesses to become active is known as
kinetic energy
potential energy
activation energy
threshold energy


12. The first order rate constant of a reaction is 0.0693 min–1. Then the time required for 50% completion of a reaction is
10 min
1 min
100 min
50 min


13. The half-life period of a first order reaction is 10 minutes. The rate constant is
6.93 x 102 min–1
0.693 x 10–2min
6.932 x 10–2 min–1
69.3 x 10–1 min–1


14. The t_1/2 of a first order reaction is 100 minutes. The rate constant of the reaction is
6.93 x 103 min–1
0.693 x 10–1 min–1
6.93 x 10–3 min
69.3 x 10–2 min


15. The unit of zero order rate constant is
sec–1
mol lit–1 sec–1
mol sec–1
lit2 sec–1


16. Arrhenius equation is
k = A . e–1/RT
k = A . e–RT/Ea
k = A . e –Ea/RT
k = A . eEa/RT


17. The rate constant for a first order reaction is 1.54 x 10–3 sec–1. Its half life period is
540 seconds
450 seconds
45 seconds
54 seconds


18. 2N2O5  →   4NO2 + O2, d/dt  [N2O5]= k1[N2O5], d/dt  [NO2]  = k2[N2O5] and d/dt  [O2]  = k3[N2O5], the  relation between k1, k2 and k3 is
2k1 = 4k2 = k3
k1 = k2 = k3
2k1 = k2 = 4k3
2k1 = k2 = k3


19. The term A in Arrhenius equation is called as
Probability factor
Activation of energy
Collision factor
Frequency factor


20. The unit of first order rate constant is
litre mo1–1sec–1
mol litre–1sec
sec–1
litre2sec–1

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