A. Increases, for an exothermic reaction
B. Decreases, for an exothermic reaction
C. Increases, for an endothermic reaction
D. None of these
Related Mcqs:
- 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 - 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 - After throttling, gas temperature___________________?
A. Decreases
B. Increases
C. Remain same
D. May increase or decrease; depends on the nature of the gas - Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant ‘K’ is____________________?
A. 10 atm-1
B. 105 atm-1
C. 10 (dimensionless)
D. 105 (dimensionless) - The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are ?
A. 1
B. 2
C. 3
D. 0 - “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 - 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 - The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the _____________ equation?
A. Van Laar
B. Margules
C. Gibbs-Duhem
D. Gibbs-Duhem-Margules - Gibbs free energy at constant pressure and temperature under equilibrium conditions is___________________?
A. ∞
B. 0
C. Maximum
D. Minimum - Molar heat capacity of water in equilibrium with ice at constant pressure is __________ Kcal/kg mole. °K___________________?
A. 0
B. ∞
C. 50
D. 100