Conditions For Equilibrium (Grade 10)
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Conditions For Equilibrium
1.
Which statement correctly compares the rates of forward and reverse reactions at equilibrium?
- The rates are constant.
- The rates are equal.
- The rate of the reverse reaction is less than that of the forward reaction.
- Both a and b are correct.
2.
Which statement correctly describes the concentrations of reactants and products at equilibrium?
- The concentrations of reactants and products are equal.
- The concentrations of the reactants are greater.
- The concentrations of the products are greater.
- The concentrations are constant.
3.
Which of the following conditions is always required for equilibrium?
- Concentrations to be zero
- Concentrations of both products and reactants to be increasing
- A closed system
- An irreversible process
4.
Which of the following kinds of changes can reach equilibrium?
- Phase changes
- Chemical reactions
- Dissolving of a solute
- All of the above
5.
Which two processes are involved in the phase equilibrium between a solid and a liquid?
- Melting and Evaporation
- Evaporation and Condensation
- Sublimation and Deposition
- Melting and Freezing
6.
Which two processes are involved in the solution equilibrium between solid NaCl and aqueous NaCl?
- Dissolving and evaporation
- Dissolving and crystallization
- Evaporation and crystallization
- Dissolving and melting
7.
Which statement correctly describes what occurs BEFORE equilibrium is established in a chemical reaction?
- The concentrations of both the products and the reactants decrease.
- The concentrations of both the products and the reactants increase.
- The concentrations of the products increase, and the concentrations of the reactants decrease.
- The concentrations of the products decrease, and the concentrations of the reactants increase.
8.
Which term correctly describes a solution that is at equilibrium with the solid form of the solute?
- Unsaturated
- Supersaturated
- Saturated
- None of the above
9.
The of the liquid and gas forms of [math]H_2O[/math] each remain constant in the case of a phase equilibrium.
10.
A process at equilibrium can be irreversible.
- True
- False
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