Chemical Kinetics  MCQs

MCQs of Chemical Kinetics

Showing 1 to 10 out of 228 Questions
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1.
Which unit of time is selected for fast reactions ?
(a) Day
(b) Second
(c) Year
(d) Nanosecond.
Answer:

Option (d)

2.
The reaction rate increases with increase in temperature, because _____
(a) Energy barrier decreases
(b) Threshold energy increases
(c) Activation energy increases
(d) The number of molecules undergoing effective collision increases.
Answer:

Option (d)

3.
For the reaction n1A + n2B → Products; rate =K[A]3[B]0 if concentration of A is doubled and concentration of B is halved, then reaction rate _____
(a) Increases by four times
(b) Increases by eight times
(c) Is doubled
(d) Becomes ten times.
Answer:

Option (b)

4.
Which of the following is indicated by the stoichiometry of the reaction ?
(a) Order of reaction
(b) Mechanism of reaction
(c) The number of intermediate compound
(d) The relative mole number of reactants and products.
Answer:

Option (d)

5.
What is the SI unit of reaction rate ?
(a) mol sec-1
(b) mol m-3 sec-1
(c) mol dm sec-1
(d) mol lit-1
Answer:

Option (b)

6.
If the order of reaction is 'n', then what will be the unit of its rate constant ?
(a) litn mol-n2 sec-1
(b) (mol  lit-1)n-1 sec-1
(c) litmoln-1  Sec-1n
(d) moln lit-n sec-1
Answer:

Option (b)

7.
If the relation between half reaction time and R0, is t12 α 1R0n-1 then what will be the order of reaction ?
(a) n-22
(b) n-1
(c) 1n-2
(d) n
Answer:

Option (d)

8.
The order of following reactions are respectively _____H2g + Cl2g  →hv 2HClgH2g + Br2g  → 2HBrg H2g + I2g  → 2HIg 
(a) 2, 2, 2
(b) 0, 2, 2
(c) 0, 1.5, 2
(d) 2, 1.5, 2
Answer:

Option (c)

9.
If two reactants are taking part in the reaction, then the reaction will never be
(a) First order
(b) Second order
(c) Monomolecular
(d) Bimolecular.
Answer:

Option (c)

10.
Of which of the following factors, the rate of reaction depends on
(a) Molecular mass of reactant
(b) Atomic mass of reactant
(c) Equivalent weight of reactant
(d) Active mass of reactant.
Answer:

Option (d)

Showing 1 to 10 out of 228 Questions
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