Chemical Equilibrium
.
- 1.
What is true about the equilibrium state?
- A.
The forward reaction stops.
- B.
The reverse reaction stops.
- C.
Both forward and reverse reactions stops.
- D.
Both forward and reverse reactions continue at the same rate.
Correct Answer
D. Both forward and reverse reactions continue at the same rate. -
- 2.
When a mixture of H2 and I2 is sealed in a flask and temperature is kept at 25o C? Which substance or substances will be present in the equilibrium mixture?
- A.
H2 and I2
- B.
H2 only
- C.
H2 only
- D.
H2, I2 and HI
Correct Answer
D. H2, I2 and HI -
- 3.
What are the units for?
- A.
Mol.dm-3
- B.
Mol2.dm6
- C.
Dm3.mol-1
- D.
No units
Correct Answer
D. No units -
- 4.
Which of the following reactions will not have any units for Kc?
- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
All of these
Correct Answer
D. All of these -
- 5.
Concentrations of reactants and products at equilibrium remain unchanged if ?
- A.
Concentration of any reactant or product is not changed
- B.
Temperature of reaction is not changed
- C.
Pressure or volume of the system is not changed
- D.
All of the above are observed
Correct Answer
D. All of the above are observed -
- 6.
Which of the following does not happen, when system is at equilibrium?
- A.
Forward and reverse reaction stop.
- B.
Forward and reverse reaction become equal.
- C.
Concentration of reactant and product stop changing.
- D.
Reaction continues to occur in both directions
Correct Answer
A. Forward and reverse reaction stop. -
- 7.
For which reaction, Kc has units of mol.dm-3?
- A.
Option 1
- B.
Option 2
- C.
Option 3
- D.
Option 4
Correct Answer
C. Option 3 -
- 8.
In irreversible reaction, equilibrium is?
- A.
Established quickly
- B.
Established slowly
- C.
Never established
- D.
Established when reaction stops.
Correct Answer
C. Never established -
- 9.
Active mass means?
- A.
Total mass of reactants
- B.
Total mass of products
- C.
Total mass of reactants and products
- D.
Mass of substance in mole per dm-3 in a dilute solution
Correct Answer
D. Mass of substance in mole per dm-3 in a dilute solution -
- 10.
For a reversible reaction, Which substance is product of the reaction?
- A.
A
- B.
B
- C.
Both A and B
- D.
C
Correct Answer
A. A -
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Current Version
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Mar 15, 2022Quiz Edited by
ProProfs Editorial Team -
Jan 12, 2021Quiz Created by
Zafar Iqbal
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