A reversible reaction is said to have attained equilibrium when:
The rate of the forward reaction is equal to the rate of the backward reaction and the concentrations of reactants and products are the same.
The rate of the forward reaction is not equal to the rate of the backward reaction and the concentrations of reactants and products remain constant.
The rate of the forward reaction is equal to the rate of the backward reaction and the concentrations of reactants and products remain constant.
The rate of the forward reaction is equal to the rate of the backward reaction.
A ... is a chemical reaction which can proceed in both the forward and the backward directions depending on the conditions of the reaction.
Irreversible reaction.
Reversible reaction.
A chemical change.
Rate reaction.
Consider the following reaction system in equilibrium.
2SO2(g) + O2(g) ⇌ 2SO3(g) ΔH = -197 KJ/mol
According to Le Chatelier’s principle, if the temperature of the system is lowered :
The equilibrium position will shift to the left favouring the endothermic reaction so that the extra heat added is used up.
The equilibrium position will shift to the left i.e. the exothermic reaction will be favoured so as to replenish the heat removed from the system.
The equilibrium position will shift to the right i.e. the exothermic reaction will be favoured so as to replenish the heat removed from the system.
The equilibrium position will shift to the right and then to the left i.e. the exothermic reaction will be favoured so as to replenish the heat removed from the system.
Which of the following statements is correct as the system proceeds towards equilibrium?
A net forward reaction occurs because Qc > Kc.
A net forward reaction occurs because Qc = Kc.
A net backward reaction occurs because Qc < Kc.
A net backward reaction occurs because Qc > Kc.
Which of the following is not a general characteristic of equilibria involving physical processes?
Equilibrium is possible only in a closed system at a given temperature.
The opposing processes occur at the same rate and there is dynamic but stable condition.
All the physical processes stop at equilibrium.
All measurable properties of the system remain constant.
