Chemical Kinetics
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Keep it short & simple. Type complete word. Avoid abusive language.
In the presence of a catalyst, the heat evolved or absorbed during the reaction _____.
A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease
In the presence of a catalyst, the heat evolved or absorbed during the reaction _____.
A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease
This is a Fill in the blanks Type Question as classified in NCERT Exemplar
Correct option: C
A catalyst allows a chemical reaction to occur at a faster rate or under different conditions than it would otherwise. As a result, a catalyst affects the reaction's enthalpy change, or heat. As a result
Upvote 
Activation energy of a chemical reaction can be determined by ________.
A. Determining the rate constant at standard temperature
B. Determining the rate constants at two temperatures
C. Determining probability of collision
D. Using catalyst
Activation energy of a chemical reaction can be determined by ________.
A. Determining the rate constant at standard temperature
B. Determining the rate constants at two temperatures
C. Determining probability of collision
D. Using catalyst
This is a Fill in the blanks Type Question as classified in NCERT Exemplar
Correct option: B
The Arrhenius equation can be used to calculate the activation energy of a chemical process. At two temperatures, this determines the rate constants.
2.303log = =
Upvote The role of a catalyst is to change ______.
A. Gibbs energy of reaction
B. Enthalpy of reaction
C. Activation energy of reaction
D. Equilibrium constant
The role of a catalyst is to change ______.
A. Gibbs energy of reaction
B. Enthalpy of reaction
C. Activation energy of reaction
D. Equilibrium constant
This is a Fill in the blanks Type Question as classified in NCERT Exemplar
Option C
Gibbs energy of reaction - Gibbs free energy is a single-valued combination of entropy and enthalpy. The direction of a chemical reaction at constant temperature and pressure is predicted by Gibbs free energy.
Enthalpy
Upvote Assertion: Rate constants determined from Arrhenius equation are accurate for simple as well as complex molecules.
Reason: Reactant molecules undergo chemical change irrespective of their orientation during collision.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
Assertion: Rate constants determined from Arrhenius equation are accurate for simple as well as complex molecules.
Reason: Reactant molecules undergo chemical change irrespective of their orientation during collision.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct option: C
The assertion is valid, but the reasoning is erroneous because Arrhenius equation rate constants are accurate for both simple and complex molecules with suitable orientation during effective collision and sufficient
Upvote Assertion: All collision of reactant molecules leads to product formation.
Reason: Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
Assertion: All collision of reactant molecules leads to product formation.
Reason: Only those collisions in which molecules have correct orientation and sufficient kinetic energy lead to compound formation.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct option: E
The claim is erroneous, but the reason is right, because the correct assertion is that effective collision leads to the production of a product, and the reason states that the conditions of collision theory must be m
Upvote Assertion: The enthalpy of reaction remains constant in the presence of a catalyst.
Reason: A catalyst participating in the reaction, forms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
Assertion: The enthalpy of reaction remains constant in the presence of a catalyst.
Reason: A catalyst participating in the reaction, forms different activated complex and lowers down the activation energy but the difference in energy of reactant and product remains the same.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct option: A
Both the assertion and the reason are valid, and the reason is a correct of the assertion since the enthalpy of reaction is the difference between the total enthalpy of the reactants and products in the presenc
Upvote Assertion: Order and molecularity are same.
Reason: Order is determined experimentally, and molecularity is the sum of the stoichiometric coefficient of rate determining elementary step.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
Assertion: Order and molecularity are same.
Reason: Order is determined experimentally, and molecularity is the sum of the stoichiometric coefficient of rate determining elementary step.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct option: E
The order and molecularity may or may not be the same, assertion is false, but reason is right. The sum of the power of the reactants is the order of reaction, which may be easily determined. The total of the stoichi
Upvote Assertion: Order of the reaction can be zero or fractional.
Reason: We cannot determine order from balanced chemical equation.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
Assertion: Order of the reaction can be zero or fractional.
Reason: We cannot determine order from balanced chemical equation.
Choose the correct answer out of the following choices.
A. Both assertion and reason are correct, and the reason is correct of assertion.
B. Both assertion and reason are correct, but reason does not explain assertion.
C. Assertion is correct, but reason is incorrect
D. Both assertion and reason are incorrect.
E. Assertion is incorrect, but reason is correct.
This is a Assertion and Reason Type as classified in NCERT Exemplar
Correct option: B
Both assertion and reason are valid, but reason does not explain assertion because the order of reaction can be zero or even fractional because the order of reaction is proportional to the total of the power of the r
Upvote 
This is a Matching Type Question as classified in NCERT Exemplar
(i)- (b) ; (ii)- (a) ; (iii)- (d); (iv)- (c)
The rate rule was discovered experimentally and can be used to predict the reaction rate and reactant concentrations.
The rate constant is the proportionality constant that describes the
Upvote 
This is a Matching Type Question as classified in NCERT Exemplar
(i)- (b) ; (ii)- (c) ; (iii)- (a)
The rate of conversion in diamond is normally imperceptible.
Long-term rate at a moment's notice
The average rate is only for a short time.
Upvote