Chemistry Chemical Equilibrium MCQs Chapter 8 Class 11





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Chemistry Ch 8 Class 11 Chemical Equilibrium

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The value K for H2(g) + CO2(g) H2O(g) + CO(g) is 1.80 at 1000 C. If 1.0 mole of each H2 and CO2 are placed in 1 litre flask, the final equilibrium concentration of CO at 1000 C will be:

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Le-Chatelier Principle is about

PMC Sample 3
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Buffer solution is a solution which resists change in?

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In a reaction:

A+B 2C

When equilibrium was attained, the concentration was

[A] = [B] = 4 moles/dm3

[C]= 6 moles/dm3
The equilibrium constant Kc of this reaction is:

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Equilibrium constant has no units if?

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1 mole of N2O4 (g) was placed in an empty 1 dm^3 container and allowed to reach equilibrium according to the following equation:

N2O4(g) 2NO2(g)

At equilibrium, x mole Of N2O4 (g) had dissociated. What is the value of the equilibrium constant, Kc, at the temperature of the Experiment?

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Common Ion effect is useful application in?

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Which of the following factor(s) affect a reversible chemical reaction in accordance with the Le – Chatelier Principle?

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For the equilibrium reaction 2 NO2 N2O4 (g) + 61 kJ, increase of temperature would:

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If the value of ‘Kc’ is very large then, it shows that ______ completed.

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If Kc = 1, then reaction is:

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If the ratio of initial concentration of the reagents is greater than the Kc then:

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Buffer solution of every liquid is

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When 18 x 10-3 moles/dm3 of acetic acid react with 22 x 10-3 moles/dm3 of ethyl alcohol to form 40 x 10-3 moles/dm3 of ethyl acetate and 40 x 10-3 moles/dm-3 of water. Find the value of equilibrium constant (kc):

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In the reaction, 2SO2 (g) + O2 ⇌ 2SO3 (g) ∆H= +X cal most favorable conditions of temperature and pressure for a greater yield of SO2 are:

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For a gaseous phase reaction, when number of moles of reactants and products are equal:

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In Exothermic Reactions heat is _______

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In a exothermic process, forward direction reaction is favored by:

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For a reaction 2A + B ⇌ C + D the active mass of B is kept constant and that of A is tripled. It is observed that the rate of reaction:

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The equation N2(g)+ 3H2(g)⇋ 2NH3(g)represents:

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Consider the following reaction

N2(g) + O2(g) 2NO (g) Kc- 0.1 at 2000 C

If the original concentration of N2 and O2 were 0.1 M each. Calculate the concentrations of NO at equilibrium.

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What is correct relation between Kw, Kb and Ka?

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Law of mass action was derived by:

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A very small value of ‘Kc’ for a reaction at equilibrium indicates:

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If Kc < 1, then the reaction proceeds:

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At equilibrium, which of the following reactions is not affected by pressure?

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If the value of Kc is large than the ratio (products)/(reactants), the reaction:

28 / 68

In the reaction;

H2 + CO2 H2O + CO

The decrease in the concentration of reactants and products cause the equilibrium to shift:

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For an equilibrium change involving gaseous phase, the forward reaction is first order while the reverse reaction is second order. The unit of Kp for the forward equilibrium is:

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Le Chatelier’s principle explains effect of all of the following except

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1.8 x 10 -5 is the dissociation constant of:

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The Kcunits for the reaction N2(g) + 3H2(g) -> 2NH3(g) are:

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A chemical engineer wants to use the Haber process in order to produce ammonia as raw material for fertilizers. Which of the following parameters must the chemical engineer AVOID in order to obtain the maximum yield of ammonia?
N2(g) + 3H2(g) -> 2NH3(g) ΔH0 = -92.6 kJ/mol

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Buffer capacity depends upon

36 / 68

A solution having pH = 0 is

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Purification of table salt (NaCl) by passing HCl gas through its saturated aqueous solution is an example of:

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Which of the following reaction has greater Kp than Kc?

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For which one of the following gaseous equilibrium will an increase in pressure increase the yield of the product:

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A system at equilibrium can be disturbed by:

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For the following exothermic reaction, a decrease in temperature will shift the equilibrium towards: 2NO (g) + O2(g) -> 2NO2 (g)

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A correct formula must:

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For, the reaction:

N2 + 3H2 ⇌ 2NH3

The production of NH3 will be favored at:

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If 4.6 gm of ethyl alcohol and 6.0 gm of acetic acid is kept at a constant temperature until equilibrium was established, 2.0 gm of unused acetic acid were present. What is the Kc?

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The change in concentration of reactant or product per unit time is called:

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The Ksp of AgCl is 2.0 x 10^-10-1010 mol2dm-6 . The maximum concentration of Ag+ ions:

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In a reversible reaction, catalyst lowers the action energy of the:

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For a gaseous reaction, the increase in pressure will shift the equilibrium in a direction:

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At equilibrium the concentration of reactants and product become:

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How will the equilibrium of the following reaction be affected if additional nitrogen is added?

N2(g) + 3H2(g)⇌ 2NH3(g)

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Concentration of reactants and products are expressed as Moles per unit _______.

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When the number of moles of reactants and products are equal in reversible reactions which parameter would not affect at equilibrium?

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Which of the following has the highest value of pKa?

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A reaction with a tendency of occurring in forward and backward direction simultaneously is termed as

PMC Sample 1
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57 / 68

The solubility product of AgCl is 2.0×10-10 mol-2 dm-6. The maximum concentration of Ag+1 ions in the solution is:

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Precipitation occurs when the product of ionic concentrations is:

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Which statement about the following equilibrium is correct?

2SO2 (g) + O2(g) ⇌ 2SO3(g) ΔH= – 395 KJ/ mole

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If concentration of OH- Ions Is 0.1 molar. What Is the pH of the solution?

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A solution has pH of 10. What is the value of [OH-]?

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For a reversible reaction to reach an equilibrium state the reaction should be carried out in:

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By which of the following factors, equilibrium state is attained earlier?

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64 / 68

A reaction with a tendency of occurring in forward and backward direction simultaneously is termed as

PMC Sample 2
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65 / 68

The Haber Process is used to produce ammonia commercially according to the following equilibrium: N2(g) + 3H2g = 2NH3g + energy Which of the following conditions will produce the highest yield of ammonia?

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According to the law of mass action, “The rate of chemical reaction” is proportional to the:

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The following changes to the system at equilibrium have no effect on Kc except:

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4 responses to “Chemistry Chemical Equilibrium MCQs Chapter 8 Class 11”

  1. MCQ no 10 is wrong correct answer is D (increasing presure and decreasing temprature)

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