Chemical Equilibrium and Kinetics AFCAT Questions

AFCAT Chemistry

Chemical Equilibrium and Kinetics MCQ Questions


13.
The time required for half of a reactant to be consumed is called ______.
A.
Order
B.
Rate constant
C.
Activation energy
D.
Half-life
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ANSWER :
D. Half-life
14.
The reaction in which two molecules combine to form a single product is called ______.
A.
Substitution reaction
B.
Addition reaction
C.
Elimination reaction
D.
Rearrangement reaction
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ANSWER :
B. Addition reaction
15.
For a first-order reaction, the plot of ln[A] vs. time is:
A.
Linear
B.
Parabolic
C.
Circular
D.
Exponential
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ANSWER :
A. Linear
16.
Le Chatelier's principle applies to ______.
A.
Open systems
B.
Isolated systems
C.
Closed systems
D.
None of the above
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ANSWER :
C. Closed systems
17.

A reaction with a rate law r=k[A][B]2 is ______ order overall.

A.

First

B.

Second

C.

Third

D.

Fourth

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ANSWER :

C. Third

18.

The reaction quotient Q determines the direction of the reaction by comparing it with ______.

A.

Catalyst

B.

Rate constant

C.

Activation energy

D.

Equilibrium constant K

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ANSWER :

D. Equilibrium constant K