6) Which of the following is TRUE for a system that is in dynamic equilibrium? A

Question

6) Which of the following is TRUE for a system that is in dynamic equilibrium? A) The forward reaction goes to 100% completion. B) The reaction rate of the forward reaction approaches zero. C) The concentration of products is equal to the concentration of the reactants D) Both the forward and reverse reactions come to a halt. E) none of the above 7) Which of the following is TRUE about a chemical system in equilibrium? A) No reaction takes place. B) Temperature changes have no effect on reaction rate. C) Addition of more reactants have no effect on reaction rate. D) Reaction rate remains stable as long as temperature and pressure are stable. E) none of the above 9) A chemical equilibrium exists when: A) reactants are completely changed to products. B) there are equal amounts of reactants and products. C) the rate at which reactants form products becomes zero. D) the sum of reactant and product concentrations equals one mole. E) the rate at which reactants form products is the same as the rate at which products form reactants.

Explanation / Answer

A reaction is said to be in dynamic equilibrium when the ratio of reactants and products doesn't change ie, the rate of forward and reverse reaction becomes constant, so in effect htere will be no change.

6.) Ans is D as its like there is no current change.

7.) The equilibrium will be disturbed whren there is an external change in pressure, temperature or concentration by Le- Chatlier's principle. Thus option D is the ans.

9.) Ans E is the option as the equilibrium is said to be attained when the rate of forward and reverse reaction is equal.

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