FSC Chemistry MCQs Chapter 8 Class 11





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Chemistry Ch 8 Class 11 Chemical Equilibrium

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At equilibrium the concentration of reactants and product become:

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

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

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

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

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

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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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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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If Kc < 1, then the reaction proceeds:

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If Kc = 1, then reaction is:

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

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

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1.8 x 10 -5 is the dissociation constant of:

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

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In Exothermic Reactions heat is _______

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Buffer solution is a solution which resists change in?

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

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A system at equilibrium can be disturbed by:

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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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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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A solution having pH = 0 is

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Which of the following has the highest value of pKa?

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

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

PMC Sample 2
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Le-Chatelier Principle is about

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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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Equilibrium constant has no units if?

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Buffer solution of every liquid is

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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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Which of the following reaction has greater Kp than Kc?

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

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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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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 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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Common Ion effect is useful application in?

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

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Buffer capacity depends upon

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For, the reaction:

N2 + 3H2 ⇌ 2NH3

The production of NH3 will be favored at:

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50 / 68

Precipitation occurs when the product of ionic concentrations is:

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A correct formula must:

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

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56 / 68

What is correct relation between Kw, Kb and Ka?

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

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58 / 68

Law of mass action was derived by:

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59 / 68

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

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

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

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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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64 / 68

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

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65 / 68

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

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

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

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4 responses to “FSC Chemistry MCQs Chapter 8 Class 11”

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

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