Chemical Kinetics Test

Result

Chemical Kinetics Test - 8

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Weekly Quiz Competition

Question 1
4 / -1

A reaction proceeds by first order, 75% of this reaction was completed in 32 min. The time required for 50% completion is

A
8 min

B
16 min

C
20 min

D
24 min

Solution
Question 2
4 / -1

For a reaction, the rate constant is 2.34 s^-1. The half-life period for the reaction is

A
0.30 s

B
0.60 s

C
3.3 s

D
data is insufficient

Solution
Question 3
4 / -1

In a chemical reaction, two reactants take part. The rate of reaction is directly proportional to the concentration of one of them and inversely proportional to the concentration of the other. The order of reaction is

A
0

B
1

C
2

D
4

Solution
Question 4
4 / -1

A reaction involving two different reactants can never be

A
bimolecular reaction

B
second order reaction

C
first order reaction

D
unimolecular reaction

Solution
Question 5
4 / -1

In the first order reaction, the concentration of the reactants is reduced to 25% in one hour. The half-life period of the reaction is

A
2 h

B
4 h

C
1/2 h

D
1/4 h

Solution
Question 6
4 / -1

For a reaction, X (g) → Y (g) + Z(g) the half-life period is 10 min. In what period of time would the concentration of X be reduced to 10% of original concentration ?

A
20 min

B
33 min

C
15 min

D
25 min

Solution
Question 7
4 / -1

Chemical reactions with very high E_a values are generally

A
very fast

B
very slow

C
moderately fast

D
spontaneous
Question 8
4 / -1

With increase in temperature, rate of reaction

A
increases

B
decreases

C
remains same

D
may increase or decrease
Question 9
4 / -1

Which increases on increase of temperature ?

A
Energy of activation (E_a)

B
Collision frequency (Z)

C
Rate constant (k)

D
Both (2) and (3)
Question 10
4 / -1

The minimum energy required for the reacting molecules to undergo reaction is

A
potential energy

B
kinetic energy

C
thermal energy

D
activation energy