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Equilibrium

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Law of Mass Action and Equilibrium Constant

Subtopic

Law of Mass Action and Equilibrium Constant under Equilibrium for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    The numerical value of the equilibrium constant KK depends on:

    A.

    The path taken to reach equilibrium

    B.

    The presence of a catalyst

    C.

    The temperature

    D.

    The time taken to reach equilibrium

  2. 2.

    For the reaction PCl5(g)⇌PCl3(g)+Cl2(g)PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g), what are the units of KcK_c?

    A.

    mol L−1mol\ L^{-1}

    B.

    L mol−1L\ mol^{-1}

    C.

    mol2 L−2mol^2\ L^{-2}

    D.

    Dimensionless

  3. 3.

    The reaction quotient QcQ_c is used to:

    A.

    Calculate the temperature

    B.

    Predict the direction of the reaction

    C.

    Measure the rate of reaction

    D.

    Determine the catalyst efficiency

Download the worksheet for Equilibrium - Law of Mass Action and Equilibrium Constant to practice offline. It includes additional chapter-level practice questions.

Le Chatelier’s Principle

Subtopic

Le Chatelier’s Principle under Equilibrium for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In the reaction H2(g)+Cl2(g)⇌2HCl(g)H_2(g) + Cl_2(g) \rightleftharpoons 2HCl(g), the effect of increasing the concentration of Cl2Cl_2 is to:

    A.

    Decrease the concentration of HClHCl

    B.

    Increase the concentration of H2H_2

    C.

    Increase the concentration of HClHCl

    D.

    Decrease the pressure

  2. 2.

    What is the result of adding more CaO(s)CaO(s) to the equilibrium CaCO3(s)⇌CaO(s)+CO2(g)CaCO_3(s) \rightleftharpoons CaO(s) + CO_2(g)?

    A.

    The equilibrium shifts to the left

    B.

    The equilibrium shifts to the right

    C.

    The concentration of CO2CO_2 decreases

    D.

    The equilibrium position remains unchanged

  3. 3.

    For the equilibrium 2H2(g)+CO(g)⇌CH3OH(g)2H_2(g) + CO(g) \rightleftharpoons CH_3OH(g), what happens to the equilibrium if the volume is halved?

    A.

    Shifts to the left

    B.

    Shifts to the right

    C.

    Remains unchanged

    D.

    The catalyst becomes inactive

Download the worksheet for Equilibrium - Le Chatelier’s Principle to practice offline. It includes additional chapter-level practice questions.

Ionic Equilibrium (Acids, Bases, and Salts)

Subtopic

Ionic Equilibrium (Acids, Bases, and Salts) under Equilibrium for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is a Lewis acid?

    A.

    H2OH_2O

    B.

    NH3NH_3

    C.

    AlCl3AlCl_3

    D.

    OH−OH^-

  2. 2.

    What happens to the pHpH of water if we increase the temperature?

    A.

    Increases

    B.

    Decreases

    C.

    Remains 7

    D.

    Becomes 14

  3. 3.

    Which of the following is a property of a buffer solution?

    A.

    Its pHpH changes rapidly on adding acid

    B.

    It resists change in pHpH

    C.

    It always has a pHpH of 7

    D.

    It is always a mixture of two strong acids

Download the worksheet for Equilibrium - Ionic Equilibrium (Acids, Bases, and Salts) to practice offline. It includes additional chapter-level practice questions.

Solubility Product and pH Scale

Subtopic

Solubility Product and pH Scale under Equilibrium for Grade 11 ICSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If the pHpH of a solution increases from 3 to 4, the [H+][H^+] concentration:

    A.

    Increases by 10 times

    B.

    Decreases by 10 times

    C.

    Increases by 1 unit

    D.

    Remains same

  2. 2.

    Solubility product KspK_{sp} of a salt depends on:

    A.

    Concentration of ions

    B.

    Temperature

    C.

    Volume of solution

    D.

    Size of the container

  3. 3.

    The numerical value of pHpH for a 0.1 M0.1\ M strong monobasic acid is:

    A.

    0

    B.

    1

    C.

    0.1

    D.

    10

Download the worksheet for Equilibrium - Solubility Product and pH Scale to practice offline. It includes additional chapter-level practice questions.

Equilibrium - ICSE Class 11 Chemistry Notes & Revision | Krit.club