Chemical Kinetics Test

Result

Chemical Kinetics Test - 25

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Weekly Quiz Competition

Question 1
4 / -1

The rate law for the reaction RCl + NaOH → ROH + NaCl(aq ) is given by, Rate = k [RCl]. The rate of the reaction will be

A
Doubled on doubling the concentration of sodium hydroxide

B
Halved on reducing the concentration of alkyl halide to one half

C
Decreased on increasing the temperature of the reaction

D
Unaffected by increasing the temperature of the reaction
Question 2
4 / -1

The rates of reactions increase with increase of temperature because

A
activation energy of the reacting molecules decreases

B
kinetic energy of the product molecules increases

C
the fraction of the reacting molecules possessing an energy equal to the activation energy or more increases

D
the collisions between molecules decrease

Solution
Question 3
4 / -1

The rate constant (k’) of one of the reaction is found to be double that of the rate constant (k’’) of another reaction. Then the relationship between the corresponding activation energies of the two reactions (E_a’ and E_a’’) can be represented as

A
E_a’ > E_a’’

B
E_a’ < E_a’’

C
E_a’ = E_a’’

D
E_a’ = 4E_a’’
Question 4
4 / -1

What will be the order of the reaction if doubling the concentration of a reactant increases the rate by a factor of 4 and trebling the concentration of the reactant by a factor of 9?

A
First order

B
Zero order

C
Second order

D
Third order
Question 5
4 / -1

Select the law that corresponds to data shown for the following reaction
A + B → Products
Exp. [A] [B] initial rate
1 0.012 0.035 0.1
2 0.024 0.070 0.8
3 0.024 0.035 0.1
4 0.012 0.070 0.8

A
rate = k [B]³

B
rate = k [B]³

C
rate = k [A] [B]³

D
rate = k [A]² [B]²
Question 6
4 / -1

The one which is unimolecular reaction is

A

B

C

D
Question 7
4 / -1

A
2 and 2 respectively

B

C

D

Solution
Question 8
4 / -1

For an exothermic reaction, the energy of activation of the reactants is

A
equal to the energy of activation of products

B
less than the energy of activation of products

C
greater than the energy of activation of products

D
sometimes greater and sometimes less than that of the products

Solution
Question 9
4 / -1

A
a first order reaction

B
a second order reaction

C
independent of the initial concentration of the salt

D
a zero order reaction
Question 10
4 / -1

Which of the following statement about the catalyst is true?

A
A catalyst accelerates the rate of reaction by bringing down the energy of activation

B
A catalyst does not participate in reaction mechanism

C
A catalyst makes the reaction more feasible by making ∆G more negative

D
A catalyst makes equilibrium constant more favorable for forward reaction