Advertisements
Advertisements
प्रश्न
Answer the following in one or two sentences.
How do the half-lives of the first order and zero-order reactions change with the initial concentration of reactants?
उत्तर
i. The half-life of the first-order reaction is independent of the initial concentration of the reactant.
ii. The half-life of zero-order reactions is proportional to the initial concentration of the reactant.
APPEARS IN
संबंधित प्रश्न
Answer the following in brief.
Obtain the relationship between the rate constant and half-life of a first-order reaction.
How will you represent first order reactions graphically.
Answer the following in brief.
What is a zeroth-order reaction?
Derive the integrated rate law for the zeroth order reaction.
Write order of the following reaction:
\[\ce{2NH_{3(g)} -> N_{2(g)} + 3H_{2(g)}}\]
Explain pseudo first order reaction with a suitable example.
A zero-order reaction \[\ce{X -> Product}\], with an initial concentration 0.02 M has a half-life of 10 min. if one starts with concentration 0.04 M, then the half-life is
The decomposition of phosphine (PH3) on tungsten at low pressure is a first-order reaction. It is because the
Assertion: rate of reaction doubles when the concentration of the reactant is doubles if it is a first-order reaction.
Reason: rate constant also doubles.
If 75% of a first order reaction was completed in 60 minutes, 50% of the same reaction under the same conditions would be completed in ____________.
Write the rate law for the following reaction.
A reaction that is second order in NO and first order in Br2.
Give two examples for zero order reaction.
The time for half change in a first order decomposition of a substance A is 60 seconds. Calculate the rate constant. How much of A will be left after 180 seconds?
From the following data, show that the decomposition of hydrogen peroxide is a reaction of the first order:
| t (min) | 0 | 10 | 20 |
| V (ml) | 46.1 | 29.8 | 19.3 |
Where t is the time in minutes and V is the volume of standard KMnO4 solution required for titrating the same volume of the reaction mixture.
If [A] is the concentration of A at any time t and [A]0 is the concentration at t = 0, then for the 1st order reaction, the rate equation can be written as ____________.
A first order reaction completes its 10% in 20 minutes, then the time required to complete its 19% is ____________.
The rate of formation of B at time t for reaction \[\ce{2A -> 3B}\] is equal to ____________.
For a first order reaction, \[\ce{A -> B}\], if [A] = 1 M and rate is 4 × 10−2 M s−1. What is the rate constant of the reaction?
Which among the following is an example of pseudo first order reaction?
In a reaction \[\ce{N2_{(g)} + 3H2_{(g)} -> 2NH3_{(g)}}\], if the rate of disappearance of N2(g) is 2.6 × 10−4 M/s, the rate of disappearance of H2(g) in M/s is ____________.
A first order reaction, A → B takes 100 minutes for it's 90% completion. What is the rate constant of reaction?
Rate constant for zero order reaction is 2 × 10-2 mol L-1 s-1. If the concentration of the reactant after 25 sec. is 0.5 M, what is the initial concentration of reactant?
Obtain the expression for half-life and rate constant of the first-order reaction.
The rate constant and half-life of a first order reaction are related to each other as ______.
Which is the relation between half life and rate constant for a zero order?
The half-life of first order reaction is 1.7 hour. What is its rate constant?
Which of the following correctly represents integrated rate law equation for a first order reaction in a gas phase?
What are integrated rate laws?
