Chemical Kinetics
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For a complex reaction ______________.
A. Order of overall reaction is same as molecularity of the slowest step.
B. Order of overall reaction is less than the molecularity of the slowest step.
C. Order of overall reaction is greater than molecularity of the slowest step.
D. Molecularity of the slowest step is never zero or non-integer
For a complex reaction ______________.
A. Order of overall reaction is same as molecularity of the slowest step.
B. Order of overall reaction is less than the molecularity of the slowest step.
C. Order of overall reaction is greater than molecularity of the slowest step.
D. Molecularity of the slowest step is never zero or non-integer
This is a Multiple Choice Questions as classified in NCERT Exemplar
Correct options: A and D
A complex reaction is one that does not happen in a single step.
The total number of molecules involved in the slowest step of the reaction determines the overall reaction rate.
Upvote 
In any unimolecular reaction ______________.
A. Only one reacting species is involved in the rate determining step.
B. The order and the molecularity of the slowest step are equal to one.
C. The molecularity of the reaction is one and order is zero.
D. Both molecularity and order of the reaction are one.
In any unimolecular reaction ______________.
A. Only one reacting species is involved in the rate determining step.
B. The order and the molecularity of the slowest step are equal to one.
C. The molecularity of the reaction is one and order is zero.
D. Both molecularity and order of the reaction are one.
Correct options: A and B
This is a Multiple Choice Questions as classified in NCERT Exemplar
Unimolecular reaction: Unimolecular means relating to a single molecular reaction that describes decomposition of a single reactant.
If product A→ (B)
rate = k [A]
Example Na2O4 (g)→2No2 (g)
Order = 1
Molecularity
Upvote Which of the following statements are applicable to a balanced chemical equation of an elementary reaction?
A. Order is the same as molecularity.
B. Order is less than molecularity.
C. Order is greater than molecularity.
D. Molecularity can never be zero.
Which of the following statements are applicable to a balanced chemical equation of an elementary reaction?
A. Order is the same as molecularity.
B. Order is less than molecularity.
C. Order is greater than molecularity.
D. Molecularity can never be zero.
This is a Multiple Choice Questions as classified in NCERT Exemplar
Correct options: A and D
Elementary reaction: It is a reaction that occurs in a single step.
Here we must understand about the Order and Molecularity.
Molecularity of a reaction = number of reacting species (collide to bring a che
Upvote Rate law cannot be determined from balanced chemical equation if _______.
A. Reverse reaction is involved.
B. It is an elementary reaction.
C. It is a sequence of elementary reactions.
D. Any of the reactants is in excess
Rate law cannot be determined from balanced chemical equation if _______.
A. Reverse reaction is involved.
B. It is an elementary reaction.
C. It is a sequence of elementary reactions.
D. Any of the reactants is in excess
This is a Multiple Choice Questions as classified in NCERT Exemplar
Correct options : A, C and D.
Rate law = Experimental rate of the reaction
Suppose aA + bB→cC + dD
Then rate = k [A] α [B] β
Here instead of using complex reaction we use elementary reaction which gets solved in one step
Upvote Why can we not determine the order of a reaction by taking into consideration the balanced chemical equation?
Why can we not determine the order of a reaction by taking into consideration the balanced chemical equation?
This is a Short Answer Type Question as classified in NCERT Exemplar
Incorrect order results from a balanced chemical equation. KClO3 + 6FeSO4 + 3H2SO4→KCl + 3H2O + 3Fe2 (SO4)3
This reaction is complex and occurs in several steps. The order is determined by the slowest in the reactions
Upvote Why molecularity is applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?
Why molecularity is applicable only for elementary reactions and order is applicable for elementary as well as complex reactions?
This is a Short Answer Type Question as classified in NCERT Exemplar
Simple reactions occur in a single stage, whereas complicated reactions occur in multiple steps. Each phase in a multi-step process has its own molecularity, which is not added together. There is no molecularity in complex reactions
Upvote Why can’t molecularity of any reaction be equal to zero
Why can’t molecularity of any reaction be equal to zero
This is a Short Answer Type Question as classified in NCERT Exemplar
The number of molecules of the reactants involved in an elementary reaction is referred to as the molecularity of the reaction. For this, a single molecule with a minimum molecularity of one is required, and it cannot be zero
Upvote Why in the redox titration of KMnO4 vs oxalic acid, we heat oxalic acid solution before starting the titration?
Why in the redox titration of KMnO4 vs oxalic acid, we heat oxalic acid solution before starting the titration?
This is a Short Answer Type Question as classified in NCERT Exemplar
At room temperature, the redox titration of KMnO4vs oxalic acid is exceedingly slow; nevertheless, as the temperature rises, so does the rate of reaction. At a temperature of 500c., KMnO4 is acidified with dil H2SO4 and intera
Upvote Thermodynamic feasibility of the reaction alone cannot decide the rate of the reaction. Explain with the help of one example
Thermodynamic feasibility of the reaction alone cannot decide the rate of the reaction. Explain with the help of one example
This is a Short Answer Type Question as classified in NCERT Exemplar
Thermodynamic feasibility is determined by ΔG factors. So, while the conversion of diamond to graphite is thermodynamically viable, the reaction is sluggish and has a high activation energy.
Gibb's free energy is ΔG
ΔG =Rtl
Upvote Why does the rate of any reaction generally decrease during the reaction?
Why does the rate of any reaction generally decrease during the reaction?
This is a Short Answer Type Question as classified in NCERT Exemplar
The pace of any reaction is determined by the concentration of the reactants, the rate of any reaction generally declines during the reaction. As the reaction progresses, the reactant concentration declines, and the product concentr
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