Chemical Kinetics  MCQs

MCQs of Chemical Kinetics

Showing 21 to 30 out of 228 Questions
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21.
In the reaction A→B, If the concentration of A is doubled then the reaction rate increases by 1.59 times then what will be the order of reaction ?
(a) 23
(b) 32
(c) (1.59)2
(d) 1.59
Answer:

Option (a)

22.
Zero order reaction means _____
(a) Reaction occurring at zero Kelvin temperature
(b) The value of reaction rate is zero
(c) The reaction in which the reactants do not take part in chemical reaction
(d) Reaction rate and rate constant are equal.
Answer:

Option (d)

23.
Which of the following reactions will be comparatively the slowest ?
(a) Decomposition of urea in presence of urease enzyme
(b) Formation of rust on iron in presence of inhibitors
(c) The combination of N2 and O2 when lightening is there in the sky
(d) The rate of reverse reaction in presence of catalyst.
Answer:

Option (b)

24.
What is studied in chemical kinetics ?
(a) Structure of molecules
(b) Possibility whether reaction will occur or not
(c) Reactants will transform into which product
(d) The study of reaction rates of chemical and physical changes.
Answer:

Option (d)

25.
Which of the following unit of time possessing reaction will be the fastest ?
(a) Femtosecond
(b) Nanosecond
(c) Picosecond
(d) Microsecond.
Answer:

Option (a)

26.
Elementary reaction 2SO2(g) + O2(g) →Products. If pressure is increased by three times then reaction rate _____
(a) Increases by 3 times
(b) Increases by 9 times
(c) Increases by 18 times
(d) Increases by 27 times
Answer:

Option (d)

27.
According to transition state theory, the reaction can be shown passing through which of the following steps ?
(a) Reactants → Products → Activated complex
(b) Reactants → Products
(c) Reactants → Activated complex → Products
(d) Reactants → Activated complex products →Activated complex → Products
Answer:

Option (c)

28.
For elementary reaction, which of the following is correct ?
(a) Order of reaction > molecularity
(b) Order of reaction ≠ molecularity
(c) order of reaction = molecularity
(d) Order of reaction < molecularity.
Answer:

Option (c)

29.
According to molecular collision theory, the reaction is subjected to _____
(a) Number of molecular collisions of reactant
(b) Number of collisions between reactants and activated complex
(c) The collision rate between reactants and product molecules
(d) Number of effective molecular collisions of reactants
Answer:

Option (d)

30.
Which scientist explained the effect of temperature on the reaction rate constant ?
(a) Faraday
(b) Waag and Guldberg
(c) Le-Chatelier
(d) Arrhenius
Answer:

Option (d)

Showing 21 to 30 out of 228 Questions
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