मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता १२ वी

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

Advertisements
Advertisements

प्रश्न

Choose the most correct option.

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

पर्याय

  • -k

  • k

  • `"k"/2.303`

  • `"-k"/2.303`

MCQ
रिकाम्या जागा भरा
Advertisements

उत्तर

The slope of the graph ln[A]t versus t for the first-order reaction is -k.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 6: Chemical Kinetics - Exercises [पृष्ठ १३५]

APPEARS IN

बालभारती Chemistry [English] Standard 12 Maharashtra State Board
पाठ 6 Chemical Kinetics
Exercises | Q 1. v. | पृष्ठ १३५

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 _______.


Choose the most correct option.

The reaction, \[\ce{3ClO- -> ClO^-3 + 2Cl-}\] occurs in two steps, 

(i) \[\ce{2ClO- -> ClO^-2}\]

(ii) \[\ce{ClO^-2 + ClO- -> ClO^-_3 + Cl-}\] 

The reaction intermediate is _______.


Choose the most correct option.

Rate law for the reaction, \[\ce{2NO + Cl2 -> 2NOCl}\] is rate = k[NO2]2[Cl2]. Thus of k would increase with _____________.


Answer the following in one or two sentences.

For the reaction, \[\ce{CH3Br_{(aq)} + OH^{-}_{(aq)} -> CH3OH^{\ominus}_{(aq)} + Br^{\ominus}_{(aq)}}\], rate law is rate = \[\ce{k[CH3Br][OH^\ominus]}\]

How does reaction rate changes if \[\ce{[OH^\ominus]}\] is decreased by a factor of 5?


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"^-]`

What is the change in rate if concentrations of both reactants are doubled?


The rate law relates to the rate of a chemical reaction in terms of _______.


Order of reaction for which unit of rate constant is mol dm–3 s–1 is _______.


Write four key points about order of reaction.


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.


In a hypothetical reaction,

\[\ce{2A + B -> Products}\]. Rate = k [A]2 [B]

Molar concentration of 'B' is kept constant and molar concentration of 'A' is tripled, then the rate of reaction will ____________.


For the non-stoichiometric reaction

\[\ce{2A + B -> C + D}\], 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:


For the reaction, \[\ce{N2(g) + 3H2(g) -> 2NH3(g); \Delta H}\] is equal to ______.


A gaseous hypothetical chemical equation \[\ce{2A ⇌ 4B + C}\] is carried out in a closed vessel. The concentration of B is found to increase by 5 × 10−3 mol dm−3 in 10 second. The rate of ____________.


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 ____________.


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


Molarity of H2SO4 is 18 M. Its density is 1.8 g/ml. Hence molality is ______.


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


The correct order of raaii of F, F-, O and O2- is ______.


Write the rate law for the following reaction:

A reaction that is zero order in A and second order in B.


Write the rate law for the following reaction:

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


For a chemical reaction A → 7 products, the rate of reaction doubles when the concentration of A is increased by a factor 4. The order of the reaction is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×