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This quiz contains multiple-choice problems on rate coefficient modelling and kinetic models size reduction.
The value of the rate constant for a zero-order reaction is obtained by the plot between
Concentration vs time
Concentration vs rate
Rate vs time
Concentration vs rate
The rate constant is a
Linear function of frequency factor
Exponential function of frequency factor
Logarithmic function of frequency factor
Sinusoidal function of frequency factor
The rate-determining step of a series of reactions is one
That is fastest
That is slowest
That does not contribute to the reaction
That does not occur
An assumption of steady-state approximation is
Reaction occurs without the formation of intermediates
Catalyst does not accelerate reaction rate
One of the intermediates in the reaction is consumed as quickly as it is generated
Equilibrium state is attained at the end of a reaction
The order of the reaction involving the conversion of ozone to oxygen is
Zero-order
First-order
Second-order
Third-order
At very low concentrations of azomethane, its decomposition follows which order?
First-order
Zero-order
Third-order
Second-order
The formation of hydrogen iodide from its corresponding elements is a
Single step mechanism
Two-step mechanism
Three-step mechanism
Four-step mechanism
For a first-order reaction, the rate constant as a function of half-life is given as
(0.6931)/k
0.6931×k
0.6931
k/(0.6931)
For a first-order reaction, the rate constant is expressed in terms of initial concentration C{A{0}} and final concentration C{A} as
C{A} = C{A{0}} × k
C{A} = C{A{0}} × e^(-kt)
C{A} = C{A{0}} × kt
C{A} = CA{{0}} × e^kt
For a reaction with negative order n, which of the following is true about the reaction rate constant?
k = - r{A}
k = 1
k = - (r{A} / C{A}^n)
k = - (r{A} * C{A}^n)
Which of the following theories does not propose the temperature dependence of rate constant?
Arrhenius theory
Collision theory
Transition state theory
Bohr’s theory
If the rate of a zero-order reaction is 10 * [mol/(s*m^3] and the reaction time is 5 s, then the rate constant is
1 s^(-1)
2 s^(-1)
5 s^(-1)
10 s^(-1)
Which among the following is true for liquid phase reactions of order n?
ln (-dC/dt) = ln k + n*(ln C)
ln (-dC/dt) = ln k + ln C
ln (-dC/dt) = n*(ln k) + ln C
ln (-dC/dt) = ln k + (ln C)/n
For the parallel reactions A → B and A → C, of rate constants k1 and k2 respectively and both of order 1, the rate expression is given as
- r{A} = k1*C{A} + k2*C{A}
- r{A} = k1*C{A} – k2*C{A}
- r{A} = k2*C{A}
- r{A} = k1*C{A}
For any order n, the rate constant is expressed as
- r{A}
- r{A} × C{A}^n
- r{A} × C{A}
- r{A} / C{A}^n
