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Class 12 Exam  >  Class 12 Questions  >  For the reaction,A + 2B→C+ DThe rate law... Start Learning for Free
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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?
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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.
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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
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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?
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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?.
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