Two substances are in equilibrium in a reversible chemical reaction. If the concentration of each substance is doubled, then the value of the equilibrium constant will be___________________?

Related Mcqs:

1. Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The ratio of chemical potential to free energy of a pure substance at constant temperature and pressure is________________?

   A. 0
   B. 1
   C. ∞
   D. None of these

2. On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line (∂P/∂V)T are related as (where, y = Cp/Cv) ?

   A. (∂P/∂V)S = (∂P/∂V)T
   B. (∂P/∂V)S = [(∂P/∂V)T]Y
   C. (∂P/∂V)S = y(∂P/∂V)T
   D. (∂P/∂V)S = 1/y(∂P/∂V)T

3. “The rate at which a substance reacts is proportional to its active mass and the rate of a chemical reaction is proportional to the product of active masses of the reacting substances”. This is the_________________?

   A. Lewis-Randall rule
   B. Statement of Van’t Hoff Equation
   C. Le-Chatelier’s principle
   D. None of these

4. In which of the following reaction equilibrium, the value of equilibrium constant Kp will be more than is Kc ?

   A. 2HI ⇌ H2 + I2
   B. N2O4 ⇌ 2NO2
   C. 2SO2 + O2 ⇌ 2SO3
   D. None of these

5. At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?

   A. μ° + RT ln f
   B. μ°+ R ln f
   C. μ° + T ln f
   D. μ° + R/T ln f

6. ____________ explains the equilibrium constant for any chemical reaction?

   A. Henry’s law
   B. Law of mass action
   C. Hess’s law
   D. None of these

7. The equilibrium constant for a chemical reaction at two different temperatures is given by__________________?

   A. Kp2/Kp1 = – (ΔH/R) (1/T2 – 1/T1)
   B. Kp2/Kp1 = (ΔH/R) (1/T2 – 1/T1)
   C. Kp2/Kp1 = ΔH (1/T2 – 1/T1)
   D. Kp2/Kp1 = – (1/R) (1/T2 – 1/T1)

8. The free energy change for a chemical reaction is given by (where, K = equilibrium constant)________________?

   A. RT ln K
   B. -RT ln K
   C. -R ln K
   D. T ln K

9. The unit of equilibrium constant of a chemical reaction is the same as that of__________________?

   A. Molar concentration
   B. Temperature
   C. Internal energy
   D. None of these

10. “When a system in equilibrium is subjected to a change in temperature, pressure or concentration, the equilibrium is displaced in a direction which tends to undo the effect of the change.” This is called the_______________?

    A. Le-Chatelier principle
    B. Kopp’s rule
    C. Law of corresponding state
    D. Arrhenius hypothesis