The Effect of Temperature on the Rate of Reactions NEET Questions

Physical Chemistry - Chemical Kinetics

The Effect of Temperature on the Rate of Reactions MCQ Questions


7.
The logarithmic form of Arrhenius equation is
A.
log k = log A - Ea/2.303RT
B.
log k = A - Ea/RT
C.
log A = log k - Ea/RT
D.
log k = Ea/2.303RT
😑 View Answer Rough Work Error
ANSWER :
A. log k = log A - Ea/2.303RT
8.
Activation energy is defined as
A.
Minimum energy required to initiate a reaction
B.
Average energy of reactants
C.
Energy released during reaction
D.
Energy difference between products and reactants
😑 View Answer Rough Work Error
ANSWER :
A. Minimum energy required to initiate a reaction
9.
If temperature is increased, the fraction of molecules possessing threshold energy
A.
Decreases
B.
Remains unchanged
C.
Increases
D.
Becomes zero
😑 View Answer Rough Work Error
ANSWER :
C. Increases
10.
Which factor is directly affected by a rise in temperature in a chemical reaction?
A.
Molecular mass
B.
Activation energy
C.
Rate constant
D.
Molarity
😑 View Answer Rough Work Error
ANSWER :
C. Rate constant
11.
What is the unit of activation energy when R is in J/mol·K?
A.
kJ/mol
B.
K
C.
J/mol
D.
mol/J
😑 View Answer Rough Work Error
ANSWER :
C. J/mol
12.
Why does the rate of reaction increase with temperature?
A.
More molecules acquire activation energy
B.
More collisions occur
C.
Molecular mass increases
D.
Pressure increases
😑 View Answer Rough Work Error
ANSWER :
A. More molecules acquire activation energy