WorksheetsChp. 14 Practice Test
Total questions: 52
Worksheet time: 4hrs 20mins
If there is only single substance (atom, molecule, or ion) involved in the rate-determining step, that reaction is said to be
unimolecular
bimolecular
polimolecular
trimolecular
If there is two substances (atom, molecule, or ion) involved in the rate-determining step, that reaction is said to be
unimolecular
bimolecular
trimolecular
polimolecular
Reaction :
2A + B → C + D
is proposed to have reaction mechanism shown below :
A + B → AB + D (slow)
A + AB → C (fast)
the consistent rate equation with the reaction mechanism above is ____
rate = k [A]2 [B]
rate = k [A]2 [B]2
rate = k [A] [B]
rate = k [A] [B]2
The decomposition of nitrous oxide :
2N2O(g) → 2N2(g) + O2(g)
is believed to occur by two-step mechanism
N2O(g) → N2(g) + O(g) (slow)
N2O(g) + O(g) → N2(g) + O2(g) (fast)
the consistent rate equation based on the mechanism above is ____
rate = k [N2O]2
rate = k [N2O]
rate = k [N2O]2 [N2]
rate = k
A possible mechanism for reaction :
A + 2B → C + D
is shown below :
2B → E (slow)
A + E → C + D (fast)
which of the following diagram represents reaction pathway diagram for this reaction mechanism?
the reaction between gaseous iodine monochloride, ICl, and gaseous hydrogen :
H2(g) + 2ICl (g) → I2(g) + 2HCl (g)
has a rate equation : k [ICl] [H2]
Which one ARE TRUE based on information above?
unimolecular reaction probably take places in rate-determining step
H2 molecules only involve in fast step reaction
It's likely that only 1 molecules of ICl involve in rate-determining step
The reaction doesn't depends on the concentration of H2
The rate of a reaction is dependent on the concentration of the reactants
True
False
What does collision theory state?
For a reaction to occur, particles must collide with sufficient energy.
For a reaction to occur, particles must collide with proper orientation.
Both of the above are correct.
The K value of a reaction is dependent on the concentration of the reactants.
True
False
Arrhenius equation is
k = AeEa/RT
k = Ae-Ea/RT
k = AeRT/Ea
k = Ae-RT/Ea
If we plot log k Vs 1/T, by Arrhenius equation, the slope is
-Ea/R
+Ea/R
-Ea/2.303R
+Ea/2.303R
A catalyst increases the rate of a chemical reaction by
increasing the activation energy
decreasing the activation energy
reacting with reactants
reacting with products
The time of half change of a first order reaction is _______initial concentration.
proportional to
inversely proportional to
independent of
equal to
The unit of rate and rate constant are same for ______order reaction
zero
one
two
three
For an elementary reaction 2A + B →C + D, the molecularity is
zero
one
two
three
The rate law of the reaction 2N2O5 → 2NO2 + O2 is
r = k[N2O5 ]
r = k[N2O5 ]2
r = k[N2O5 ]0
r = k[NO2]4 [O2]
What is the order of a Reaction
the sum of powers of the coefficients of the reactants in the rate law expression is called the order of that chemical reaction.
the sum of powers of the concentration of the reactants in the rate law expression is called the order of that chemical reaction.
the sum of powers of the concentration of the reactants in the snell's law expression is called the order of that chemical reaction.
the sum of powers of the volume of the reactants in the rate law expression is called the order of that chemical reaction.
Which of the following is possible in a zero order Reaction
(2 options)
The rate of reaction is dependent of the concentration of the reactants in these reactions.
The rate of reaction is independent of the concentration of the reactants in these reactions.
A change in the concentration of the reactants has effect on the speed of the reaction
A change in the concentration of the reactants has no effect on the speed of the reaction
What is the order of reaction with respect to A?
What is the overall order of reaction?
What will happen to the rate of reaction if the concentration of A is doubled and the concentration of B is tripled?
