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Tenth Grade (Grade 10) Kinetics and Equilibrium Questions

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Grade 10 Kinetics and Equilibrium
Grade 10 Kinetics and Equilibrium
Which statement correctly compares the rates of forward and reverse reactions at equilibrium?
1. The rates are constant.
2. The rates are equal.
3. The rate of the reverse reaction is less than that of the forward reaction.
4. Both a and b are correct.
Grade 10 Kinetics and Equilibrium
In which of the following chemical reactions are the reactants completely converted into products?
1. $2KClO_3(s) -> 2KCl (s) + 3O_2(g) uarr$
2. $N_2(g) + 3H_2(g) hArr 2NH_3(g)$
3. $N_2O_4 (g) hArr 2NO_2(g)$
4. $N_2(g) + O_2(g) hArr 2NO(g)$
Grade 10 Kinetics and Equilibrium
Grade 10 Kinetics and Equilibrium
Which of the following conditions is always required for equilibrium?
1. Concentrations to be zero
2. Concentrations of both products and reactants to be increasing
3. A closed system
4. An irreversible process
Grade 10 Kinetics and Equilibrium
Which two processes are involved in the phase equilibrium between a solid and a liquid?
1. Melting and Evaporation
2. Evaporation and Condensation
3. Sublimation and Deposition
4. Melting and Freezing
Grade 10 Kinetics and Equilibrium
Which statement correctly describes the concentrations of reactants and products at equilibrium?
1. The concentrations of reactants and products are equal.
2. The concentrations of the reactants are greater.
3. The concentrations of the products are greater.
4. The concentrations are constant.
Grade 10 Kinetics and Equilibrium
Which of the following kinds of changes can reach equilibrium?
1. Phase changes
2. Chemical reactions
3. Dissolving of a solute
4. All of the above
Grade 10 Kinetics and Equilibrium
Which statement correctly describes what occurs BEFORE equilibrium is established in a chemical reaction?
1. The concentrations of both the products and the reactants decrease.
2. The concentrations of both the products and the reactants increase.
3. The concentrations of the products increase, and the concentrations of the reactants decrease.
4. The concentrations of the products decrease, and the concentrations of the reactants increase.
Grade 10 Kinetics and Equilibrium
Which set of values represents standard pressure and standard temperature?
1. 1 atm and 101.3 K
2. 1 kPa and 273 K
3. 101.3 kPa and 0°C
4. 101.3 atm and 273°C
Grade 10 Kinetics and Equilibrium
Grade 10 Kinetics and Equilibrium
Grade 10 Kinetics and Equilibrium
Which two processes are involved in the solution equilibrium between solid NaCl and aqueous NaCl?
1. Dissolving and evaporation
2. Dissolving and crystallization
3. Evaporation and crystallization
4. Dissolving and melting
Grade 10 Kinetics and Equilibrium
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