A ‘limiting reactant’ is the one, which decides the ____________ in the chemical reaction?

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. 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

3. If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will___________________?

   A. Increase
   B. Decrease
   C. Remain unaltered
   D. Increase or decrease; depends on the particular reaction

4. Chemical engineering thermodynamics is concerned with the ____________ in/of chemical processes?

   A. Reaction mechanism
   B. Calculation of rates
   C. Energy transformation from one form to another
   D. None of these

5. ____________ 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

6. For the gaseous phase chemical reaction, C2H4(g) + H2O(g) ↔ C2H5OH(g), the equilibrium conversion does not depend on the________________?

   A. Steam to ethylene ratio
   B. Temperature
   C. Pressure
   D. None of these

7. “If different processes are used to bring about the same chemical reaction, the enthalpy change is same for all of them”. This is ______________ law?

   A. Hess’s
   B. Kirchoff’s
   C. Lavoisier and Laplace
   D. None of these

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. 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___________________?

   A. Same
   B. Doubled
   C. Halved
   D. One fourth of its original value

10. 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