Equilibria (triple) quiz Loading... 1. What does the symbol ⇌ mean?Variable oxidation stateA reaction that requires a catalystEqual amounts of reactants and productsReversible reactionQuestion 1 of 15 Loading... 2. With how much energy must two particles collide for a reaction to occur?The particles must collide with an energy less than the activation energyThe particles must collide with an energy greater than or equal to the activation energyThe particles must collide with an energy greater than the activation energyThe particles must collide with an energy equal to the activation energyQuestion 2 of 15 Loading... 3. What does this diagram represent?Reaction profile for an endothermic reactionEnergy level diagram for an endothermic reactionReaction profile for an exothermic reactionEnergy level diagram for an exothermic reactionQuestion 3 of 15 Loading... 4. State and explain how increasing temperature affects the diffusion of a gasGas diffuses quicker because there is less in its wayGas diffuses slower because the particles have less energyGas diffuses slower because the particles collide more often with the airGas diffuses quicker because particles have more energy.Question 4 of 15 Loading... 5. In a sealed container, a reversible reaction can reach a state of ______________________________Constant equilibriumStatic equilibriumVariable equilibriumDynamic equilibriumQuestion 5 of 15 Loading... 6. Explain the effects of increasing the temperature on the rate of a reaction in terms of particle collision theory1) particles have less kinetic energy 2) less frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) increase rate of reaction1) particles have less kinetic energy 2) less frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) decrease rate of reaction1) particles have more kinetic energy 2) more frequent collisions 3) and a higher proportion of the collisions which occur have greater or equal to the activation energy 4) increase rate of reaction1) particles have more kinetic energy 2) more frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) increase rate of reactionQuestion 6 of 15 Loading... 7. Explain why experimental values of enthalpy change differ from theoretical valuesDifferent equipment produces different results. Not all the reactants are used upHeat energy is lost to the surroundings. Not all the reactants are used up.Different equipment produces different results. Heat energy is lost to the surroundings. Not all the reactants are used upDifferent equipment produces different results. Heat energy is lost to the surroundingsQuestion 7 of 15 Loading... 8. What colour is anhydrous copper (II) sulfate?CreamWhitePurpleBlueQuestion 8 of 15 Loading... 9. The addition of water to anhydrous copper sulfate can be used to test for the presence of water. The reaction is reversible. What is the word equation? Describe the colour change.anhydrous copper sulfate (white) + water ⇌ hydrous copper sulfate (blue)anhydrous copper sulfate (blue) + water ⇌ hydrous copper sulfate (white)anhydrous copper sulfate (blue) + water ⇌ hydrated copper sulfate (white)anhydrous copper sulfate (white) + water ⇌ hydrated copper sulfate (blue)Question 9 of 15 Loading... 10. What type of substance speeds up a chemical reaction but is chemically unchanged at the end of the reaction?ReagentOreCatalystSoluteQuestion 10 of 15 Loading... 11. What is meant by the term exothermic?A reaction which will only be spontaneous at cold temperatures (below 0⁰C)A reaction in which heat energy is given out (surroundings get hotter)A reaction in which heat energy is taken in (surroundings get colder)A reaction which will only be spontaneous at warm temperatures (above 100⁰C)Question 11 of 15 Loading... 12. State the expression for calculating % yield.% yield = (actual amount of products/theoretical amount of products) x 100% yield = (actual amount of products/theoretical amount of products)% yield = (theroretical amount of products/actual amount of products) x 100% yield = (theroretical amount of products/actual amount of products)Question 12 of 15 Loading... 13. What will happen to the yield of CH₃OH when the temperature is increased? Give a reason for your prediction. CO(g) + 2H₂(g) ⇋ CH₃OH(g) ΔH = –91 kJ mol⁻1Increases because the forward reaction is exothermicDecreases because the backward reaction is endothermicIncreases because the backward reaction is endothermicDecreases because the backward reaction is exothermicQuestion 13 of 15 Loading... 14. State two features of a reaction that is in dynamic equilibrium1) The equilibrium is on the right hand side producing a greater concentration of product than reactant. 2) The rate of the forward reaction is equal to the rate of the backward reaction1) The rate of the forward reaction is greater than the rate of the backward reaction. 2) there is no overall change in concentrations1) The concentrations of products and reactants are equal. 2) the rate of the forward reaction is equal to the rate of the backward reaction1) The rate of the forward reaction is equal to the rate of the backward reaction. 2) There is no overall change in concentrations.Question 14 of 15 Loading... 15. Why a catalyst does not affect the position of equilibrium in a reversible reaction?A catalyst reduces the activation energy, and is not used upA reaction in dynamic equilibrium already has the lowest possible activation energyIf a reversible reaction is in dynamic equilibrium, a catalyst increases the rate of the forward reaction and the rate of the backward reaction by the same amount, so the position of equilibrium is unaffectedA catalyst has no effect on a forward or backward reactions if it is in dynamic equilibriumQuestion 15 of 15 Loading... Related Posts:The entire quiz question bank!The entire quiz question bank (Double only)!Key Calculations quizCondensation Polymers quizElectrolysis quizAlcohols & Carboxylic Acids quiz Hydr0Gen2020-02-16T17:37:02+00:00Categories: Uncategorized|Tags: Quiz, Topic: Equilibria| Share This Story, Choose Your Platform! FacebookXRedditLinkedInTumblrPinterestVkEmail