Chemical Kinetics Test

Result

Chemical Kinetics Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Find the correct statement(s) of the following

A
Activated complex is a postulated species which has maximum energy during the conversion of reactants into products

B
An unstable intermediate is an actual chemical species which can be stabilized under different reaction conditions

C
The transition state in a reaction has no independent existence but has greater vibrational character than unstable intermediate

D
A,B and C are correct

Solution

A,B and C are correct
Question 2
1 / -0

Which of the following method can be used to determine the rate of fast reactions?

A
Linear flow technique

B
Flash photolysis technique

C
Shock tubes technique Correct

D
A and C are corrected

Solution

Shock tubes technique and Flash photolysis technique can be used for the determination of rate of fast reactions.

The correct answer is: Shock tubes technique, Linear flow technique
Question 3
1 / -0

Statement-1 : If in a zero order reaction, the concentration of the reactant is doubled, the half-life period is also doubled.

Statement-2 : For a zero order reaction, the rate of reaction is independent of initial concentration

A
Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanation of Statement-1

B
Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1

C
Statement-1 is true but Statement-2 is false

D
Statement-1 is false but Statement-2 is true

Solution

For a zero order reaction, t_1/2 = [A₀]/2K. Hence given statements are true but Statement II is not correct explanation of Statement I.
Question 4
1 / -0

The concentration of the products in reaction I increases exponentially whereas in reaction II linearly with time. The respective orders are

A
0 and 1

B
2 and 1

C
1 and 0

D
2 and 0

Solution

Reaction I is first order and reaction II is in 0^th order.
Question 5
1 / -0

Decomposition of HI: 2HI → H₂ + I₂, is a second order reaction.

At what initial concentration of HI, the initial rate will represent the rate constant of the reaction?

A
4.0 M

B
2.2 M

C
1.2 M

D
1.0 M

Solution

Rate of reaction = k[HI]²;

rate constant =k [HI]

For Rate of reaction = rate constant

[HI] = 1.0 M