Equilibria (triple) quiz Loading... 1. What will happen to the rate of reaction when we increase pressure ? A (g) + B (g) ⇋ C (g) (-∆H)it depends on the conditionsincreaseremain constantdecreaseQuestion 1 of 15 Loading... 2. One feature of dynamic equilibrium is that the rate of the forward reaction is equal to the rate of the backward reaction. What is the other feature?The concentration of the products is increasingThe yield of the forwards reaction is greater than 50%There is no overall change in concentrationsThe yield of the backward reaction is greater than 50%Question 2 of 15 Loading... 3. What is meant by the term endothermic?A reaction in which heat energy is given out (surroundings get hotter)A reaction which will only be spontaneous at warm temperatures (above 100⁰C)A reaction which will only be spontaneous at cold temperatures (below 0⁰C)A reaction in which heat energy is taken in (surroundings get colder)Question 3 of 15 Loading... 4. 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 catalyst has no effect on a forward or backward reactions if it is in dynamic equilibriumA 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 unaffectedQuestion 4 of 15 Loading... 5. Describe the chemical test for waterAdd it to anhydrous potassium permanganate which will turn from white to purple if water is presentFind the boiling point. If it is 100 ⁰C water is presentFind the melting point. If it is 0 ⁰C then water is presentAdd it to anhydrous copper(II) sulfate which will change from white to blue if water is presentQuestion 5 of 15 Loading... 6. What happens if two particles collide with less than the activation energyNo reactionThe reaction only goes partwayThe particles fuse togetherThe reaction still occurs but very slowlyQuestion 6 of 15 Loading... 7. 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 7 of 15 Loading... 8. Gas particles move at a speed of several hundred metres per second at room temperature. Explain why gases take several minutes to diffuse across a roomGas particles are lazy and do not want to reach the other side of the roomGas particles collide with air particles and move in random directionsGas particles travel very slowlyGas particles collide with air particles and move in only one directionQuestion 8 of 15 Loading... 9. What does the symbol ⇌ mean?Reversible reactionEqual amounts of reactants and productsVariable oxidation stateA reaction that requires a catalystQuestion 9 of 15 Loading... 10. 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 (white) + water ⇌ hydrated copper sulfate (blue)anhydrous copper sulfate (blue) + water ⇌ hydrous copper sulfate (white)anhydrous copper sulfate (blue) + water ⇌ hydrated copper sulfate (white)Question 10 of 15 Loading... 11. Explain why experimental values of enthalpy change differ from theoretical valuesDifferent equipment produces different results. Heat energy is lost to the surroundings. Not all the reactants are used upDifferent 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 surroundingsQuestion 11 of 15 Loading... 12. In a sealed container, a reversible reaction can reach a state of ______________________________Variable equilibriumStatic equilibriumDynamic equilibriumConstant equilibriumQuestion 12 of 15 Loading... 13. What type of substance speeds up a chemical reaction but is chemically unchanged at the end of the reaction?SoluteReagentOreCatalystQuestion 13 of 15 Loading... 14. State the expression for calculating % yield.% yield = (theroretical amount of products/actual amount of products)% yield = (theroretical amount of products/actual amount of products) x 100% yield = (actual amount of products/theoretical amount of products) x 100% yield = (actual amount of products/theoretical amount of products)Question 14 of 15 Loading... 15. Explain the effects of increasing the surface area of a solid on the rate of a reaction in terms of particle collision theory1) more particles exposed 2) less frequent collisions 3) decrease rate of reaction1) more particles exposed 2) more frequent collisions 3) decrease rate of reaction1) more particles exposed 2) more frequent collisions 3) increase rate of reaction1) more particles exposed 2) less frequent collisions 3) increase rate of reactionQuestion 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