Rate of reaction factors order molecularity and rate laws - One Line Questions
1.
Consider the reaction: 2NO(g) + O2(g) -> 2NO2(g). If the rate law is Rate = k[NO]^2, what is the order of the reaction with respect to O2? —
0
2.
In the reaction 2NO(g) + O2(g) -> 2NO2(g), if the rate law is Rate = k[NO]^2, what is the overall order of the reaction? —
2
3.
Consider the reaction mechanism: Step 1: A + B -> C (slow) Step 2: C + D -> E (fast). What is the order of the reaction with respect to A? —
1
4.
In the mechanism A + B -> C (slow), C + D -> E (fast), what is the order of the reaction with respect to B? —
1
5.
Consider the reaction 2A -> B. If the rate law is Rate = k[A]^2, what is the order with respect to A? —
2
6.
What is the molecularity of the reaction 2A -> B, assuming it is an elementary reaction? —
2
7.
For a reaction A + B -> Products, if Rate = k[A]^1[B]^0, what is the order with respect to B? —
0
8.
For the rate law Rate = k[A]^1[B]^0, what is the overall order of the reaction? —
1
9.
What is the molecularity of the elementary reaction 2A + B -> C? —
3
10.
A reaction has a rate law Rate = k[A][B]². What is the order with respect to B? —
2
11.
For the rate law Rate = k[A][B]², what is the overall order of the reaction? —
3
12.
For the reaction H2 + I2 -> 2HI, the rate law is found to be Rate = k[H2][I2]. What is the order of this reaction? —
2
13.
If a reaction is bimolecular, its molecularity is: —
2
14.
What is the molecularity of the reaction A + B -> Products, if it occurs in a single step? —
2
15.
For a reaction A + 2B -> C, if the rate law is Rate = k[A][B]^2, the order with respect to A is: —
1
16.
For the reaction A + 2B -> C with rate law Rate = k[A][B]^2, the overall order is: —
3
17.
If the rate of reaction is R = k[A]^1.5, the order of the reaction is: —
1.5
18.
If doubling the concentration of a reactant A increases the rate of reaction by a factor of 8, the order with respect to A is: —
3
19.
Which of the following is NOT a factor affecting the rate of a chemical reaction? —
Number of moles of product formed
20.
Which factor generally increases the rate of a reaction significantly? —
Increasing temperature
21.
Molecularity of a reaction is defined for: —
Elementary reactions only
22.
For a complex reaction, the molecularity of the rate-determining step is: —
Not necessarily equal to the overall order of the reaction.
23.
The rate of reaction is expressed as Rate = k[A]^0. This means the reaction is: —
Zero order
24.
The rate law for a reaction can be determined experimentally, while molecularity can be determined: —
From the balanced chemical equation for elementary reactions.
25.
A catalyst increases the rate of a reaction by: —
Decreasing the activation energy.
26.
For a zero-order reaction, the rate is: —
Independent of the concentration of reactants.
27.
Which of the following statements about the rate constant 'k' is correct? —
It depends on the temperature.
28.
Which of the following is a characteristic of molecularity? —
It is always an integer.
29.
Which of the following is a characteristic of the order of reaction? —
It is determined experimentally.
30.
What is the relationship between the rate constant (k) and temperature (T) described by the Arrhenius equation? —
k = A * e^(-Ea/RT)
31.
Which of the following units is appropriate for the rate constant of a first-order reaction? —
s⁻¹
32.
The unit of the rate constant for a third-order reaction is: —
L² mol⁻² s⁻¹
33.
For an elementary reaction, the order of the reaction is equal to its: —
Molecularity
34.
Which of the following statements is true about order and molecularity? —
Order can be fractional, molecularity cannot.
35.
What is the unit of the rate constant for a second-order reaction? —
L mol⁻¹ s⁻¹
36.
The rate of a reaction generally increases with an increase in temperature because: —
The number of effective collisions increases.
37.
The rate of a reaction decreases as temperature decreases because: —
The number of effective collisions decreases.
38.
What is the rate of reaction? —
The change in concentration of a reactant or product per unit time.
39.
The term 'rate-determining step' in a reaction mechanism refers to: —
The slowest step in the mechanism.
40.
In the Arrhenius equation, Ea represents: —
The activation energy
41.
What does the rate constant 'k' represent? —
The proportionality constant relating rate to concentrations.
42.
For a complex reaction, the rate law is determined by: —
The slowest step (rate-determining step).
43.
For an elementary reaction, the rate law can be written by directly observing the stoichiometric coefficients of the reactants. This statement is: —
False
44.
For a reaction A + B -> Products, the rate law is given by Rate = k[A]^x[B]^y. What is the order of the reaction with respect to A? —
x
45.
The overall order of the reaction Rate = k[A]^x[B]^y is: —
x + y
46.
Can molecularity be a fractional value? —
No
47.
Can molecularity be zero? —
No
48.
If the concentration of a reactant is doubled and the rate of reaction quadruples, what is the order of the reaction with respect to that reactant? —
Second
49.
The rate of a reaction is halved when the concentration of a reactant is halved. This indicates the order with respect to that reactant is: —
First
50.
If the rate of a reaction is independent of the concentration of all reactants, the order is: —
Zero