Matter: Properties and transformation:Equilibria

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Test your knowledge on chemical equilibria and reversibility concepts!

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Matter: Properties and transformation:Equilibria


Froggy Jumps Matter: Properties and transformation:EquilibriaOnline version Test your knowledge on chemical equilibria and reversibility concepts! by YAKILI LMS 1 What is chemical equilibrium? a A state where reactions stop completely. b A state where the rate of forward reaction equals the rate of reverse reaction. c A state where only forward reactions occur. 2 What does reversibility in a reaction imply? a The reaction can proceed in both forward and reverse directions. b The reaction can only proceed in one direction. c The reaction is irreversible. 3 Which factor does NOT affect chemical equilibrium? a The color of the reactants. b Temperature changes. c Concentration of reactants. 4 What is Le Chatelier's principle? a Reactions can only shift to the right. b If a system at equilibrium is disturbed, it will shift to counteract the disturbance. c Equilibrium can only be achieved at high temperatures. 5 In a reversible reaction, what happens when you increase the concentration of reactants? a The equilibrium shifts to the left. b The equilibrium shifts to the right to produce more products. c The reaction stops. 6 What is the equilibrium constant (K)? a The total amount of reactants present. b A measure of reaction speed. c A value that expresses the ratio of products to reactants at equilibrium. 7 How does temperature affect exothermic reactions at equilibrium? a It has no effect. b Increasing temperature shifts equilibrium to the left, favoring reactants. c It shifts equilibrium to the right, favoring products. 8 What does a large equilibrium constant (K) indicate? a The products are favored at equilibrium. b The reaction is irreversible. c The reactants are favored. 9 What happens to equilibrium when pressure is increased in a gaseous reaction? a It has no effect on equilibrium. b It shifts towards the side with more moles of gas. c It shifts towards the side with fewer moles of gas. 10 Which of the following is a characteristic of dynamic equilibrium? a Only one direction of reaction occurs. b The concentrations of reactants and products remain constant over time. c The reaction stops completely. 11 What is dynamic equilibrium? a A state of complete reaction. b A state where the rate of forward reaction equals the rate of reverse reaction. c A static condition with no changes. 12 In a closed system, what happens at dynamic equilibrium? a The concentrations of reactants and products remain constant. b Reactants are completely consumed. c Only products are present. 13 Which factor can disturb dynamic equilibrium? a No external influences. b Changes in temperature, pressure, or concentration. c Constant temperature only. 14 What principle explains the response of a system at equilibrium to changes? a Le Chatelier's Principle. b Boyle's Law. c Avogadro's Law. 15 What does a catalyst do in a dynamic equilibrium? a It speeds up both the forward and reverse reactions equally. b It shifts the equilibrium position. c It only increases product formation. 16 At dynamic equilibrium, how do the rates of reactions compare? a The reverse rate is faster. b The forward rate is faster. c They are equal. 17 What is the effect of increasing pressure on a gaseous equilibrium? a It has no effect. b It shifts the equilibrium towards the side with fewer moles of gas. c It shifts towards the side with more moles of gas. 18 What happens to the equilibrium constant (K) when temperature changes? a It remains constant. b It changes depending on whether the reaction is exothermic or endothermic. c It only increases. 19 In a reaction at equilibrium, what does the term 'shift' refer to? a The speed of the reaction. b The change in position of equilibrium due to external changes. c The amount of reactants used. 20 What is a characteristic of a system at dynamic equilibrium? a It can be disturbed but will return to equilibrium. b It is permanently stable. c It cannot be disturbed. 21 What is dynamic equilibrium? a A state where the rates of forward and reverse reactions are equal. b A state where reactions stop completely. c A state where products are formed only. 22 In dynamic equilibrium, how do concentrations of reactants and products change? a They remain constant over time. b They continuously decrease. c They continuously increase. 23 What does Le Chatelier's principle state? a Equilibrium is always static. b A system at equilibrium will adjust to counteract changes. c Changes have no effect on equilibrium. 24 Which of the following is true about dynamic equilibrium? a It can occur in closed systems only. b It can occur in open systems only. c It cannot occur in any system. 25 What happens if a reactant is added to a system at dynamic equilibrium? a The system stops reacting. b The system shifts to produce more products. c The equilibrium is disrupted permanently. 26 How does temperature affect dynamic equilibrium? a It can shift the position of equilibrium. b It always favors reactants. c It has no effect on equilibrium. 27 What is a characteristic of a dynamic equilibrium? a Only the reverse reaction occurs. b Only the forward reaction occurs. c Both forward and reverse reactions are occurring. 28 In a dynamic equilibrium, what is true about energy? a Energy is continuously exchanged but remains constant overall. b Energy is gained indefinitely. c Energy is lost completely. 29 What role do catalysts play in dynamic equilibrium? a They shift the equilibrium position. b They stop the reaction completely. c They speed up the attainment of equilibrium without changing its position. 30 What does it mean if a reaction is at equilibrium? a The rates of the forward and reverse reactions are equal. b Only products are present. c The reaction has stopped. 31 What is dynamic equilibrium? a A state of constant temperature. b A state where the rate of forward reaction equals the rate of backward reaction. c A state of complete rest. 32 Which factor does NOT affect equilibrium position? a Concentration changes. b Temperature changes. c The presence of a catalyst. 33 What is Le Chatelier's principle? a Equilibrium cannot be disturbed. b If a system at equilibrium is disturbed, it will shift to counteract the disturbance. c Only temperature affects equilibrium. 34 In a closed system, what happens if the concentration of reactants increases? a The reaction stops completely. b The equilibrium remains unchanged. c The equilibrium shifts to the right, favoring products. 35 What is the effect of increasing temperature on an exothermic reaction at equilibrium? a The equilibrium shifts to the right. b The reaction rate decreases. c The equilibrium shifts to the left, favoring reactants. 36 What does the equilibrium constant (K) represent? a The rate of the forward reaction. b The ratio of concentrations of products to reactants at equilibrium. c The total concentration of all species. 37 How does pressure affect gaseous equilibria? a It always shifts to the side with more moles. b Pressure has no effect on equilibrium. c Increasing pressure shifts the equilibrium toward the side with fewer moles of gas. 38 What is the role of a catalyst in a chemical reaction at equilibrium? a It speeds up the rate of reaching equilibrium without affecting the position. b It changes the equilibrium constant. c It shifts the equilibrium position. 39 Which of the following is a characteristic of a system in equilibrium? a All reactions have stopped. b The concentrations of reactants and products remain constant over time. c Only reactants are present. 40 What happens to equilibrium when a reactant is removed? a The equilibrium shifts to the left to produce more reactants. b The reaction reverses completely. c The equilibrium remains unchanged. 41 What is a chemical reaction? a A process where reactants transform into products. b A physical change in matter. c A state of matter. 42 What does chemical equilibrium indicate? a The rates of forward and reverse reactions are equal. b All reactants are consumed. c No reactions occur. 43 Which factor can affect chemical equilibrium? a The size of the container. b The color of the reactants. c Changes in concentration, temperature, and pressure. 44 What is Le Chatelier's principle? a Reactions always go to completion. b Equilibrium is static. c A system at equilibrium will shift to counteract changes. 45 What is the equilibrium constant (K)? a The speed of the reaction. b The total mass of reactants. c A value that expresses the ratio of products to reactants at equilibrium. 46 What happens to equilibrium when temperature increases? a It always shifts to the left. b It shifts in the direction that absorbs heat. c It has no effect on equilibrium. 47 What is a catalyst's role in a chemical reaction? a It changes the equilibrium position. b It speeds up the reaction without being consumed. c It is a reactant. 48 What is dynamic equilibrium? a A state where no reactions occur. b A one-time reaction. c A state where reactions continue but concentrations remain constant. 49 What does a large K value indicate? a Products are favored at equilibrium. b The reaction is slow. c Reactants are favored. 50 What is the effect of increasing pressure on gaseous equilibrium? a It always shifts to the right. b It has no effect. c It shifts the equilibrium towards the side with fewer moles of gas.

Matter: Properties and transformation:Equilibria

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Matter: Properties and transformation:EquilibriaOnline version

by YAKILI LMS

What is chemical equilibrium?

What does reversibility in a reaction imply?

Which factor does NOT affect chemical equilibrium?

What is Le Chatelier's principle?

In a reversible reaction, what happens when you increase the concentration of reactants?

What is the equilibrium constant (K)?

How does temperature affect exothermic reactions at equilibrium?

What does a large equilibrium constant (K) indicate?

What happens to equilibrium when pressure is increased in a gaseous reaction?

Which of the following is a characteristic of dynamic equilibrium?

What is dynamic equilibrium?

In a closed system, what happens at dynamic equilibrium?

Which factor can disturb dynamic equilibrium?

What principle explains the response of a system at equilibrium to changes?

What does a catalyst do in a dynamic equilibrium?

At dynamic equilibrium, how do the rates of reactions compare?

What is the effect of increasing pressure on a gaseous equilibrium?

What happens to the equilibrium constant (K) when temperature changes?

In a reaction at equilibrium, what does the term 'shift' refer to?

What is a characteristic of a system at dynamic equilibrium?

What is dynamic equilibrium?

In dynamic equilibrium, how do concentrations of reactants and products change?

What does Le Chatelier's principle state?

Which of the following is true about dynamic equilibrium?

What happens if a reactant is added to a system at dynamic equilibrium?

How does temperature affect dynamic equilibrium?

What is a characteristic of a dynamic equilibrium?

In a dynamic equilibrium, what is true about energy?

What role do catalysts play in dynamic equilibrium?

What does it mean if a reaction is at equilibrium?

What is dynamic equilibrium?

Which factor does NOT affect equilibrium position?

What is Le Chatelier's principle?

In a closed system, what happens if the concentration of reactants increases?

What is the effect of increasing temperature on an exothermic reaction at equilibrium?

What does the equilibrium constant (K) represent?

How does pressure affect gaseous equilibria?

What is the role of a catalyst in a chemical reaction at equilibrium?

Which of the following is a characteristic of a system in equilibrium?

What happens to equilibrium when a reactant is removed?

What is a chemical reaction?

What does chemical equilibrium indicate?

Which factor can affect chemical equilibrium?

What is Le Chatelier's principle?

What is the equilibrium constant (K)?

What happens to equilibrium when temperature increases?

What is a catalyst's role in a chemical reaction?

What is dynamic equilibrium?

What does a large K value indicate?

What is the effect of increasing pressure on gaseous equilibrium?