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Mechanism of Chemical Kinetics (Grades 11-12)

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Mechanism of Chemical Kinetics

1.
Consider the chemical reaction

$2NO + Cl_2 rarr 2NOCl$

What is the order of the above chemical reaction?
1. First order
2. Second order
3. Third order
4. Fourth order

2.
Which of the following chemical reactions is an example of a first-order reaction?
1. $N_2O_5(g) rarr N_2O_4 (g) + (1/2) O_2(g)$
2. $CH_3CHO (g) rarr CH_4(g) + CO(g)$
3. $2HI (g) rarr H_2(g) + I_2(g)$
4. $2NO + Cl_2 rarr2NOCl$
3.
What is meant by an elementary step?
1. Two or more collisions
2. The rate-determining step
3. The most effective collision
4. One collision or vibration

4.
Which of the following species has the maximum energy content in a progressing chemical reaction?
1. Transition complex
2. Carbonium ion
3. Carbocation
4. Enantiomers
5.
Consider the following chemical reaction:

$2KClO_3(s) + heat rarr2KCl(s) + 3O_2(g)$

Which catalyst should be used to increase the rate of this reaction?
1. $MnO_2$
2. $V_2O_5$
3. $Al_2O_3$
4. $ZnO$

6.
Consider the following chemical reaction:

$2CH_3CHO (g) -> CH_4(g) + CO(g)$

What is the correct expression for the rate law of this chemical reaction?
1. $Rate=k[CH_3CHO]^2$
2. $Rate=k[CH_3CHO]$
3. $Rate=k[CH_4] [CO]$
4. $Rate=k[CO]$
7.
What do you call a catalyst that exists in the same phase as that of reactant?
1. Homogeneous
2. Heterogeneous
3. Inhibitor
4. Promoter

8.
Which of the following rate laws is correct for a unimolecular reaction?
1. Rate=k[A]
2. Rate=k[A][B]
3. Rate=k[A][B][C]
4. None of the above
9.
When describing the reaction mechanism of the fission of a molecule containing covalent bonds, one has to identify whether the fission was                          or                             .

10.
The rate of reaction is proportional to the surface area of the catalyst.
1. True
2. False
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