Related Questions

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 reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A 0
B 1
C ∞
D None of these
The minimum energy required to allow a chemical reaction to proceed is termed as the 'threshold energy '. Chemical reaction with low activation energy are
A Always irreversible
B Insensitive to temperature changes
C Mostly irreversible
D Highly temperature sensitive
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
In a reversible chemical reaction having two reactants in equilibrium, if the concentration of the reactants are doubled, then the equilibrium constant will
A Remain the same
B Be halved
C Also be doubled
D Become one fourth
If ΔG (free energy change) for a chemical reaction is very large and negative, then the reaction is
A Not feasible
B Just feasible
C Very much feasible
D Unpredictable as ΔG is no measure of feasibility of a reaction
A catalyst in a chemical reaction __________ free energy change in the reaction.
A Increases
B Decreases
C Either A or B; depends on the type of catalyst
D Neither A nor B
The standard Gibbs free energy change of a reaction depends on the equilibrium
A Pressure
B Temperature
C Composition
D All of the above
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 Arrehenius hypothesis
A chemical reaction will occur spontaneously at constant pressure and temperature, if the free energy is
A Zero
B Positive
C Negative
D None of these
A chemical reaction occurs when the energy of the reacting molecules is __________ the activation energy of the reaction.
A Less than
B Equal to
C More than
D Equal to or more than

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