The Concept of Dynamic Equilibrium NEET Questions

Physical Chemistry - Equilibrium

The Concept of Dynamic Equilibrium MCQ Questions


1.
At dynamic equilibrium in a reversible reaction:
A.
The reaction has stopped completely
B.
The concentrations of reactants and products are equal
C.
Both forward and reverse reactions occur at equal rates
D.
Only the forward reaction occurs
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ANSWER :
C. Both forward and reverse reactions occur at equal rates
2.
Which of the following is NOT a characteristic of dynamic equilibrium?
A.
Reactants and products have equal concentrations
B.
Rates of forward and reverse reactions are equal
C.
All measurable properties remain constant
D.
Equilibrium is achieved only in a closed system
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ANSWER :
A. Reactants and products have equal concentrations
3.
The double half-arrow (⇌) in a chemical equation indicates:
A.
The reaction is irreversible
B.
The reaction has reached completion
C.
The reaction proceeds only in one direction
D.
Both forward and reverse processes are occurring simultaneously
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ANSWER :
D. Both forward and reverse processes are occurring simultaneously
4.
Equilibrium in a physical or chemical system is best described as:
A.
Static and unchanging at molecular level
B.
Complete cessation of all molecular motion
C.
One-directional process
D.
Dynamic with continuous activity at molecular level
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ANSWER :
D. Dynamic with continuous activity at molecular level
5.
In Haber's process, the dynamic nature of equilibrium was confirmed by:
A.
Using deuterium (D2) instead of H2 and observing isotope scrambling
B.
Increasing temperature
C.
Decreasing pressure
D.
Using a catalyst
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ANSWER :
A. Using deuterium (D2) instead of H2 and observing isotope scrambling
6.
Which statement about chemical equilibrium is INCORRECT?
A.
It is achieved only in closed systems
B.
Concentrations of all species remain constant
C.
Forward reaction stops when equilibrium is reached
D.
It can be approached from either direction
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ANSWER :
C. Forward reaction stops when equilibrium is reached