WorksheetsCommission Quiz
Total questions: 25
Worksheet time: 22mins
Which of the following plots will show a linear relationship for a second order reaction?
[A] vs time
1/[A] vs time
ln[A] vs time
[A]2 vs time
A reaction is found to be second order with respect to carbon monoxide. If the concentration of carbon monoxide is doubled, the rate of reaction __________.
doubles
remains unchanged
increases by a factor of 4
is reduced by a factor of 2
Given the following rate law,
rate = k[A]2[B]
if [A] were doubled, what must happen to [B] to keep the rate constant?
[B] must quadruple
[B] must double
[B] must be havled
[B] must be quartered
Which of the following best describes why increasing temperature increase reaction rate?
Activation energy is reduced.
Collisions become more frequent.
Collisions become more energetic.
Collisions become more frequent and more energetic.
Given the following rate law,
rate = k[A]2[B]
if [A] were doubled, what must happen to [B] to keep the rate constant?
[B] must quadruple
[B] must double
[B] must be havled
[B] must be quartered
The catalyst alters the rate of a chemical reaction by,
providing an alternative pathway with a lower Ea
changing the products formed in the direction of the reaction
providing a surface on which the molecules react
increasing the frequencies of collisions between molecules
Which of the following plots will show a linear relationship for a second order reaction?
[A] vs time
1/[A] vs time
ln[A] vs time
[A]2 vs time
Which of the following best describes why increasing temperature increase reaction rate?
Activation energy is reduced.
Collisions become more frequent.
Collisions become more energetic.
Collisions become more frequent and more energetic.
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
If the rate of the reaction is equal to the rate constant, then the order of the reaction is
3
0
1
2
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]
A reaction has rate constant 0.2 X 10^-4molL-1s-1 .
The order of reaction is
Zero
First
Second
None of these
