Chemical Kinetics
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Derive an expression to calculate time required for completion of zero order reaction.
Derive an expression to calculate time required for completion of zero order reaction.
This is a Short Answer Type Question as classified in NCERT Exemplar
The concentration of the reactants does not change with time in a zero- order reaction, and the rate of concentration remains constant.
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In a reaction if the concentration of reactant A is tripled, the rate of reaction becomes twenty-seven times. What is the order of the reaction?
In a reaction if the concentration of reactant A is tripled, the rate of reaction becomes twenty-seven times. What is the order of the reaction?
This is a Short Answer Type Question as classified in NCERT Exemplar
Let order of reaction be = n
rate = k [A]n- (i)
27r = k [3A]n- (ii)
Divide (ii) by (i)
= k [3A]nn
3n = 27
n = 3
Upvote For which type of reactions, order and molecularity have the same value?
For which type of reactions, order and molecularity have the same value?
This is a Short Answer Type Question as classified in NCERT Exemplar
The order and molecularity of elementary reactions are the same. As a result of a single collision between two molecules or ions, a complicated process occurs. A reaction mechanism is a set of elementary reactions.
Upvote How can you determine the rate law of the following reaction?
2NO(g) + O2(g)→2NO2(g)
How can you determine the rate law of the following reaction?
2NO(g) + O2(g)→2NO2(g)
This is a Short Answer Type Question as classified in NCERT Exemplar
Experimentally, the reaction's rate law can be calculated.
Step 1
2NO (g) + O2 (g)→2NO2 (g)
O2 (g) is taken in excess
x molecules of NO number reacting with excess of O2
r = k [NO]x
Step 2
2NO (g) + O2 (g)→2NO2 (g)
When 2No
Upvote Write the rate equation for the 2A + B→C if the order of the reaction is zero
Write the rate equation for the 2A + B→C if the order of the reaction is zero
This is a Short Answer Type Question as classified in NCERT Exemplar
Given: Order of the reaction = 0
We know that a zero order reaction is a chemical reaction that occurs regardless of the reactant's concentration.
The rate law of 2A + B→C is
r = k [A]0 [B]0
For a zero- order reaction
r = k
Upvote State a condition under which a bimolecular reaction is kinetically first order reaction.
State a condition under which a bimolecular reaction is kinetically first order reaction.
This is a Short Answer Type Question as classified in NCERT Exemplar
A bimolecular reaction occurs when two particles collide. The product of the concentrations of both elements determines the rate of reaction. If one of the reactants is taken in substantial excess in such a way that its concentratio
Upvote With the help of an example explain what is meant by pseudo first order reaction.
With the help of an example explain what is meant by pseudo first order reaction.
This is a Long Answer Type Question as classified in NCERT Exemplar
Tell us about the pseudo-first-order reaction. It's the reaction with the highest true rate law, yet it behaves like a first order reaction, but it's more specifically a second order reaction.
As an example, consider the hydrolysis of
Upvote Explain the difference between instantaneous rate of a reaction and average rate of a reaction.
Explain the difference between instantaneous rate of a reaction and average rate of a reaction.
This is a Long Answer Type Question as classified in NCERT Exemplar
Average rate depends upon the change in concentration of reactants or products and the time taken for that change to occur. However, the average rate cannot be used to predict the rate of reaction at a particular instance as it would
Upvote Describe how the enthalpy of reaction remains unchanged when a catalyst is used in the reaction.
Describe how the enthalpy of reaction remains unchanged when a catalyst is used in the reaction.
This is a Long Answer Type Question as classified in NCERT Exemplar
Ans: Catalyst action is a complicated concept. A catalyst aids in the formation of temporary bonds during a chemical reaction. The objective of a catalyst is to lowers the activation energy. A catalyst is a substance that increa
Upvote What happens to most probable kinetic energy and the energy of activation with increase in temperature?
What happens to most probable kinetic energy and the energy of activation with increase in temperature?
This is a Long Answer Type Question as classified in NCERT Exemplar
Ans:
As illustrated in the graph, as the temperature rises, the peak pushes ahead, increasing probable kinetic energy while decreasing the number of molecules utilizing it, resulting in a faster rate of reaction.
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