Class 12 Exam  >  Class 12 Questions  >  For the reaction,A + 2B→C+ DThe rate law... Start Learning for Free
For the reaction,
A + 2B → C+ D
The rate law is k [A] [B] .
Select the correct statement.
  • a)
    Following mechanism is consistent with the stoichiometry of the net reaction and with the rate law
    A + B → I (Slow)
    I+B → C+D (Fast)
  • b)
    Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate law
  • c)
    Both (a) and (b)
  • d)
    None of the above
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the...
(a) Slow step is the rate-determining step, thus by
rate law = k[A][B]
Net reaction,

Thus, this mechanism is not consistent with the stoichiometry, but is consistent with rate law.
(b) By slow step,
Rate law = k3[A][B2]
By fast step, 

∴ 
∴ 
Thus, this mechanism is consistent with the stoichiometry of the net reaction but not with the rate law.
Thus, (b) is correct.
View all questions of this test
Most Upvoted Answer
For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the...
At certain condition increase the temp then the reaction go fast
Explore Courses for Class 12 exam

Similar Class 12 Doubts

Read the passage given below and answer the following questions:Nucleophilic substitution reaction of haloalkane can be conducted according to both SN1 and SN2 mechanisms. However, which mechanism it is based on is related to such factors as the structure of haloalkane, and properties of leaving group, nucleophilic reagent and solvent. Influences of halogen: No matter which mechanism the nucleophilic substitution reaction is based on, the leaving group always leave the central carbon atom with electron pair. This is just the opposite of the situation that nucleophilic reagent attacks the central carbon atom with electron pair. Therefore, the weaker the alkalinity of leaving group is , the more stable the anion formed is and it will be more easier for the leaving group to leave the central carbon atom; that is to say, the reactant is more easier to be substituted. The alkalinity order of halogen ion is I− < Br− < Cl− < F− and the order of their leaving tendency should be I− > Br− > Cl− > F−. Therefore, in four halides with the same alkyl and different halogens, the order of substitution reaction rate is RI > RBr > RCl > RF. In addition, if the leaving group is very easy to leave, many carbocation intermediates are generated in the reaction and the reaction is based on SN1 mechanism. If the leaving group is not easy to leave, the reaction is based on SN2 mechanism. Influences of solvent polarity: In SN1 reaction, the polarity of the system increases from the reactant to the transition state, because polar solvent has a greater stabilizing effect on the transition state than the reactant, thereby reduce activation energy and accelerate the reaction. In SN2 reaction, the polarity of the system generally does not change from the reactant to the transition state and only charge dispersion occurs. At this time, polar solvent has a great stabilizing effect on Nu than the transition state, thereby increasing activation energy and slow down the reaction rate. For example, the decomposition rate (SN1) of tertiary chlorobutane in 25° water (dielectric constant 79) is 300000 times faster than in ethanol (dielectric constant 24). The reaction rate (SN2) of 2-bromopropane and NaOH in ethanol containing 40% water is twice slower than in absolute ethanol. In a word, the level of solvent polarity has influence on both SN1 and SN2 reactions, but with different results. Generally speaking, weak polar solvent is favorable for SN2 reaction, while strong polar solvent is favorable for SN1 reaction, because only under the action of polar solvent can halogenated hydrocarbon dissociate into carbocation and halogen ion and solvents with a strong polarity is favorable for solvation of carbocation, increasing its stability. Generally speaking, the substitution reaction of tertiary haloalkane is based on SN1 mechanism in solvents with a strong polarity (for example, ethanol containing water).Q. Polar solvents make the reaction faster as they

Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: For a reaction: P + 2Q → Products, Rate = k [P]1/2[Q]1 so the order of reaction is 1.5Reason: Order of reaction is the sum of stoichiometric coefficients of the reactants.

Read the passage given below and answer the following questions:The rate of a reaction, which may also be called its velocity or speed, can be defined with relation to the concentration of any of the reacting substances, or to that of any product of the reaction. If the species chosen is a reactant which has a concentration c at time t the rate is - dc/dt, while the rate with reference to a product having a concentration x at time t is dx/dt. Any concentration units may be used for expressing the rate; thus, if moles per liter are employed for concentration and seconds for the time, the units for the rate are moles litre–1sec–1. For gas reactions pressure units are sometimes used in place of concentrations, so that legitimate units for the rate would be (mm. Hg) sec–1 and atm. sec–1 The order of a reaction concerns the dependence of the rate upon the concentrations of reacting substances; thus, if the rate is found experimentally to be proportional to the ath power of the concentration of one of the reactants A, to the both power of the concentration of a second reactant B, and so forth, via., rate = k CAα CAβ the over-all order of the reaction is simply n = α + β + ----- (2) Such a reaction is said to be of the αth order with respect to the substance A, the βth order with respect to B.In the following questions, a statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following choices on the basis of the above passage.Assertion: Reactions can occur at different speeds.Reason: Rate of reaction is also called speed of reaction.

For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer?
Question Description
For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer?.
Solutions for For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice For the reaction,A + 2B→C+ DThe rate law is k [A] [B] .Select the correct statement.a)Following mechanism is consistent with the stoichiometry of the net reaction and with the rate lawA + B→ I (Slow)I+B→C+D (Fast)b)Following mechanism is consistent with the stoichiometry of the net reaction but not with the rate lawc)Both (a) and (b)d)None of the aboveCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 12 tests.
Explore Courses for Class 12 exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev