Advertisements
Advertisements
प्रश्न
Answer the following in brief.
How will you represent the zeroth-order reaction graphically?
Advertisements
उत्तर
Graphical representation of zero-order reactions: The rate law is given as
which is a straight line given by y = mx + c.
A plot of `["A"]_"t"` versus t is a straight line.
[A]t vs t for zero-order reaction
The slope of the straight line is -k and its intercept on the y-axis is `["A"]_0`.
APPEARS IN
संबंधित प्रश्न
Answer the following in one or two sentences.
Write the relationships between rate constant and half-life of the first order and zeroth-order reactions.
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?
Answer the following in brief.
What is a zeroth-order reaction?
In a first-order reaction, the concentration of the reactant decreases from 20 mmol dm−3 to 8 mmol dm−3 in 38 minutes. What is the half-life of reaction?
Solve
The half-life of a first-order reaction is 1.7 hours. How long will it take for 20% of the reactant to react?
Derive the integrated rate law for the zeroth order reaction.
Give one example of a pseudo first-order reaction.
Explain pseudo first order reaction with a suitable example.
The rate constant of the first order reaction is 1.386 min–1. Calculate the time required for 80% reactant to decompose?
This reaction follows first-order kinetics. The rate constant at particular temperature is 2.303 × 10−2 hour−1. The initial concentration of cyclopropane is 0.25 M. What will be the concentration of cyclopropane after 1806 minutes? (log 2 = 0.3010)
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 ____________.
Describe the graphical representation of first order reaction.
A zero order reaction is 20% complete in 20 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?
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.
A first order reaction is 40% complete in 50 minutes. Calculate the value of the rate constant. In what time will the reaction be 80% complete?
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 ____________.
Which of the following represents the expression for `(3/4)^"th"` life of 1st order reaction?
For the first order reaction, plot of log10 [A]t against time 't' is a straight line with a negative slope equal to ____________.
The order of the reaction for which the unit of rate constant is s−1 is ____________.
Half-life period of a first order reaction, \[\ce{A -> product}\] is 3.0 hours. What is the value of rate constant?
The initial concentration of reactant (A) is 2 mol dm−3 for a zero order reaction \[\ce{A -> B}\]. The rate constant (k) is related to its half-life `("t"_(1//2))` by the equation:
The rate of formation of B at time t for reaction \[\ce{2A -> 3B}\] is equal to ____________.
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?
What is the unit of rate constant for the zero order reaction?
Which is the unit of rate constant for the first-order reaction if time is expressed in seconds?
The integrated rate equation is Rt = log C0 – log Ct, then the straight-line graph is obtained by plotting.
The rate constant and half-life of a first order reaction are related to each other as ______.
Calculate half-life of a first order reaction in minute if the rate constant is 1 × 10-3 s-1.
What are integrated rate laws?
