StudentAidUnit 8: Unit 8: Chemical Equilibrium — Mcqs
11th Class Chemistry · Unit 8: Chemical Equilibrium
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Multiple Choice Questions (Exercise)
1.For which system, does the equilibrium constant, Kc has units of (concentration)^-1?
2.Which statement about the following equilibrium is correct? 2SO₃(g) ⇌ 2SO₂(g) + O₂(g) ΔH = -197.9kJmol⁻¹
3.2SO₃(g) ⇌ 2SO₂(g) + O₂(g). The conventional equilibrium constant expression (Kc) for the system as described by the above equation is:
4.A saturated solution represents a dynamic equilibrium. Macroscopically, the concentration of dissolved solute is constant. Microscopically, this occurs because:
5.Which of the following statements correctly describes the effect of temperature on the equilibrium constant?
6.Consider the gas-phase equilibrium system represented by the equation: 2H₂O(g) ⇌ 2H₂(g) + O₂(g). Given that the forward reaction is endothermic, which of the following changes will decrease the equilibrium amount of H₂O?
7.Kc = 0.040 at 450°C for the given reaction, evaluate Kp for the reaction. PCl₅(g) ⇌ PCl₃(g) + Cl₂(g)
8.In which of the following gaseous equilibria, pressure has no effect on the equilibrium position?
9.Consider the equilibrium 2H₂(g) + O₂(g) ⇌ 2H₂O(g). If the concentration of H₂O(g) is increased, the concentrations of H₂(g) and O₂(g) will:
10.For a specific reaction, the value of the equilibrium constant, Kc?
SLO Based Multiple Choice Questions - Reversible and Irreversible Reactions
11.Which one of the following is not an example of reversible reaction?
12.Which one of the following is microscopic event?
13.The reversible reaction cannot be achieved in:
14.A reversible reaction is one which:
15.Which of the following is an irreversible reaction?
16.Which of the following reactions reaches equilibrium?
17.In a reversible reaction:
SLO Based Multiple Choice Questions - Dynamic Equilibrium
18.Reversible reactions are indicated by:
19.Combustion of methane is:
20.Dynamic equilibrium is attained when:
21.Which statement is true at dynamic equilibrium?
22.At equilibrium, the observable properties:
23.Which is NOT a feature of dynamic equilibrium?
24.Dynamic equilibrium occurs:
SLO Based Multiple Choice Questions - Law of Mass Action and Equilibrium Constant
25.At equilibrium:
26.Law of mass action was proposed by:
27.Law of mass action is applicable to:
28.According to law of mass action, rate of reaction is proportional to:
29.Active mass means:
30.Law of mass action applies to:
31.For reaction: aA + bB ⇌ cC + dD, the equilibrium constant expression is:
SLO Based Multiple Choice Questions - Equilibrium Constant (Kc, Kp)
32.Kc is expressed in terms of:
33.Equilibrium constant depends on:
34.If Kc > 1, the reaction:
35.Kp is used for:
36.Kp = Kc(RT)^Δn is used to relate:
37.For reaction: N₂ + 3H₂ ⇌ 2NH₃, Δn= ?
SLO Based Multiple Choice Questions - Equilibrium Position and Reaction Quotient (Q)
38.If Q = K, then:
39.If Q > K, the reaction:
40.Reaction quotient Q is calculated using:
41.A large K value indicates:
SLO Based Multiple Choice Questions - Continued
42.Q < K implies:
43.Position of equilibrium is affected by:
44.Le Chatelier's Principle applies to:
45.Increasing temperature favors:
46.Decreasing pressure shifts equilibrium towards:
47.Addition of inert gas at constant volume:
48.Catalyst affects:
49.Removing product from equilibrium:
SLO Based Multiple Choice Questions - Effect of Concentration, Pressure, Temperature, Catalyst
50.Increase in concentration of reactants:
51.Increase in pressure shifts equilibrium to:
52.Lowering temperature in an exothermic reaction:
53.Catalyst affects:
54.Which does not alter equilibrium constant?
55.Removing a reactant shifts equilibrium to:
56.Catalyst used in Haber process is:
57.Reaction in Haber process is:
SLO Based Multiple Choice Questions - Industrial Applications and Relationships
58.Pressure used in Haber process:
59.Contact process is used for:
60.Catalyst used in contact process:
61.Optimum temperature in Haber process is:
62.The relationship Kp = Kc(RT)^Δn is valid for:
63.For Δn = 0, Kp =:
64.In the equation Kp = Kc(RT)^Δn, R is:
65.If Δn is positive, then Kp is:
SLO Based Multiple Choice Questions - Relationship among Kc and Kp and Hydrolysis and Acid-Base Nature of Salts
66.In Kp = Kc(RT)^Δn, Δn is:
67.Units of Kc depend on:
68.NH₄Cl in water makes solution:
69.Na₂CO₃ in water gives:
70.Salts of weak acid + strong base are:
71.CH₃COONa in water forms:
72.Strong acid + strong base forms a:
73.Which of the following undergoes hydrolysis?