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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

For the reaction 2NOX(g)+2HX2(g)⟶NX2(g)+2HX2OX(g), The rate law is, rate = k[NO]2 [H2]. What is the overall order of reaction? - Chemistry

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प्रश्न

For the reaction \[\ce{2NO_{(g)} + 2H_{2(g)} -> N_{2(g)} + 2H2O_{(g)}}\],

The rate law is, rate = k[NO]2 [H2].

What is the overall order of reaction?

एका वाक्यात उत्तर
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उत्तर

The reaction is of second order in NO and first order in H2 and hence, the reaction is third order overall.

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पाठ 6: Chemical Kinetics - Very short answer questions

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संबंधित प्रश्‍न

Choose the most correct option.

The order of the reaction for which the units of the rate constant are mol dm-3 s-1 is _______.


The time required for 90% completion of a certain first-order reaction is t. The time required for 99.9% completion will be _________.


Choose the most correct option.

Slope of the graph ln[A]t versus t for first-order reaction is _________.


Answer the following in brief.

For the reaction 2A + B → products, find the rate law from the following data.

[A]/M [B]/M rate/M s-1
0.3 0.05 0.15
0.6 0.05 0.30
0.6 0.2 1.20

Answer the following in one or two sentences.

For the reaction,

\[\ce{CH3Br_{(aq)} + OH^-_{ (aq)} -> CH3OH^-_{ (aq)} + Br^-_{ (aq)}}\], rate law is rate = k`["CH"_3"Br"]["OH"^-]`

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A reaction occurs in the following steps:

Step 1: \[\ce{NO_{2(g)} + F_2 -> NO2F_{(g)} + F_{(g)}}\] (slow)

Step 2: \[\ce{F_{(g)} + NO_{2(g)} -> NO_2F}\] (Fast)

  1. Write the equation of overall reaction.
  2. Write the rate law.
  3. Identify reaction intermediate.

For the reaction 2A + B → C, rate of disappearance of A 0.076 mol s –1.

  1. What is the rate of formation of C?
  2. What is the rate of consumption of B?
  3. What is the rate of the overall reaction?

In a first-order reaction A → B, 60% of a given sample of a compound decomposes in 45 mins. What is the half-life of reaction? Also, write the rate law equation for the above first-order reaction.


The rate constant of a first order reaction whose half-life is 480 seconds, is ____________.


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\[\ce{2A + B -> C + D}\], the following kinetic data were obtained in three separate experiments, all at 298 K.

Initial concentration
(A)
Initial concentration
(B)
Initial rate of formation of C
(mol dm−3 s−1)
0.1 M 0.1 M 1.2 × 10−3
0.1 M 0.2 M 1.2 × 10−3
0.2 M 0.1 M 2.4 × 10−3

The rate law for the formation of C is:


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The rate law for a reaction between the substances A and B is given by, rate = k[A]n [B]m. On halving the concentration of A and doubling the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as ____________.


For a chemical reaction rate law is, rate = k[A]2[B]. If [A] is doubled at constant [B], the rate of reaction ______.


Select the rate law that corresponds to the data shown for the following reaction:

\[\ce{A + B -> C}\]

Exp. [A]
mol dm−3
[B]
mol dm−3
Initial Rate
mol dm−3
1. 0.012 0.035 0.10
2. 0.024 0.070 0.80
3. 0.024 0.035 0.10
4. 0.012 0.070 0.80

The order of the reaction occurring by following mechanism should be:

(i) \[\ce{A2 + B2 -> AB2 + A (slow)}\]

(ii) \[\ce{A + B2 -> AB2 (fast)}\]


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What is the order of reaction for decomposition of gaseous acetaldehyde?


In the reaction \[\ce{2SO_{2_{(g)}} O_{2_{(g)}} -> 2SO_{3_{(g)}}}\], the rate of disappearance of SO2 is 1.28 × 10-5 M/s. What is the rate of appearance of SO3?


For the reaction \[\ce{2A + B -> 3C + D}\], which among the following is NOT the correct rate law expression?


For the reaction \[\ce{4NH3 + 5O2 -> 4NO + 6H2O}\], the rate of disappearance of NH3 is 3.6 × 10-3 M/s. What is the rate of formation of water?


Which of the following unit is used to express the rate of a reaction?


Which of the following statement is not true for a reaction having rate law r = k[H2][I2]?


Write the rate law for the following reaction:

A reaction that is second order in NO and first order in Br2.


For the reaction A + B → P.

If [B] is doubled at constant [A], the rate of reaction doubled. If [A] is triple and [B] is doubled, the rate of reaction increases by a factor of 6. Calculate the rate law equation.


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