Catalysts
Quiz by Ana López
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46 questions
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- Q1What is a substance that increases the rate of a chemical reaction without being consumed in the process called?CatalystReactantConductorInsulator30s
- Q2Which of the following is NOT a function of a catalyst?Lowering activation energyProduction of lightIncreasing reaction rateChanging reaction mechanism30s
- Q3How does a catalyst affect the activation energy of a chemical reaction?It keeps the activation energy constantIt has no effect on the activation energyIt raises the activation energyIt lowers the activation energy30s
- Q4What is the purpose of a catalyst in a chemical reaction?To speed up the reactionTo change the color of the reaction mixtureTo slow down the reactionTo increase the pressure of the reaction30s
- Q5What is a biological catalyst that speeds up chemical reactions in living organisms?AntibodyVitaminHormoneEnzyme30s
- Q6What is the role of a catalyst in a chemical reaction?To change the color of the reactantsTo create new productsTo increase the reaction rateTo decrease the temperature of the reaction30s
- Q7Which of the following is NOT a characteristic of catalysts?They are not changed by the reactionThey lower activation energyThey speed up reactionsThey are consumed in the reaction30s
- Q8Which of the following best describes a catalyst in a chemical reaction?A substance that slows down the reaction without being consumedA substance that forms new products after the reactionA substance that produces heat during the reactionA substance that speeds up the reaction without being changed itself30s
- Q9What is the main purpose of a catalyst in a chemical reaction?To lower the activation energy needed for the reaction to occurTo change the physical state of the reactantsTo increase the reaction rate through consumptionTo create new reactants30s
- Q10What happens to the reaction rate when the surface area of reactants is increased?Remains the sameIncreasesDecreasesStops30s
- Q11How does decreasing temperature affect the reaction rate?Stops the reactionSpeeds up the reactionSlows down the reactionHas no effect on the reaction30s
- Q12What effect does increasing surface area of reactants have on the reaction rate?IncreasesHaltsRemains constantDecreases30s
- Q13Which factor does not affect the reaction rate?Color of the reactantsSurface areaConcentrationTemperature30s
- Q14How does increasing temperature affect the reaction rate?Slows down the reactionStops the reactionSpeeds up the reactionHas no effect on the reaction30s
- Q15How does concentration of reactants affect the reaction rate?StopsRemains constantIncreasesDecreases30s