Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Chemical Kinetics question

2023 · Q96
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Chemistry
  4. /Chemical Kinetics
  5. /2023 · Q96

Chemical Kinetics question

2023 · Q96

NEETChemistryChemical KineticsMCQ+4 / −1

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : A reaction can have zero activation energy.

Reason R : The minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.

In the light of the above statements, choose the correct answer from the options given below:

  1. A
    Both A and R are true but R is NOT the correct explanation of A.
  2. B
    A is true but R is false.
  3. C
    A is false but R is true.
  4. D
    Both A and R are true and R is the correct explanation of A.
View written solutionFree

Correct answer: C

A reaction cannot have zero activation energy.

$\mathrm{E_{a}}$ is minimum extra amount of energy absorbed by reactant molecules so that their energy becomes equal to threshold value.

PreviousNext

More from Chemical Kinetics

  • For a chemical reaction 4A + 3B → 6C + 9D Rate of formation of C is 6 × 10−2 mol L−1 s−1 and rate of disappearance of A is 4 × 10−2 mol L−1 s−1. The rate of reaction and amount of B consumed in interval of 10…2022 · MCQ
  • The given graph is a representation of kinetics of a reaction The y and x axes for zero and first order reactions, respectively are Includes diagram2022 · MCQ
  • For a first order reaction A → Products, initial concentration of A is 0.1 M, which becomes 0.001 M after 5 minutes. Rate constant for the reaction in min−1 is2022 · MCQ
  • For a reaction, A → B, enthalpy of reaction is −4.2 kJ mol−1 and enthalpy of activation is 9.6 kJ mol−1. The correct potential energy profile for the reaction is shown in option.2021 · MCQ
  • The slope of Arrhenius plot (lnkv/sT1​) of first order reactino is −5 × 103K. The value of Ea of the reaction is. Choose the correct option for your answer. [Given R = 8.314 JK−1mol−1]2021 · MCQ
  • The rate constant for a first order reaction is 4.606 × 10-3 s-1. The time required to reduce 2.0 g of the reactant to 0.2 g is :2020 · MCQ
  • An increase in the concentration of the reactants of a reaction leads to change in :2020 · MCQ
  • If the rate constant for a first order reaction is k, the time (t) required for the completion of 99 % of the reaction is given by :2019 · MCQ