Reaction Rate Factors Quiz

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Key factors affecting speed

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Donna Alyza Yaun

Philippines

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Reaction Rate Factors Quiz


Froggy Jumps Reaction Rate Factors QuizVersion en ligne Key factors affecting speed par Donna Alyza Yaun 1 Which factor increases reaction rate mainly by raising collision frequency among particles? a Concentration b Catalyst c Temperature 2 How does increasing surface area affect a reaction rate? a Increases rate b No change c Decreases rate 3 What is the effect of higher temperature on reaction rate? a Increases rate b No effect c Decreases rate 4 Which statement best describes the effect of the nature of reactants on rate? a Only temperature matters b Catalysts have no role c Reactivity of substances affects rate 5 What role does a catalyst play in a reaction rate? a Sticks particles together b Provides a lower activation energy path c Consumes reactants 6 If reactants are more concentrated, the rate usually: a Remains the same b Increases c Decreases 7 Which factor is not directly about particle energy or collisions? a Catalyst b Temperature c Surface area 8 Nature of reactants affects rate because: a Some substances collide to form products more readily b All reactions are identical c Rate depends only on volume 9 Why does a catalyst increase the rate without being consumed? a It is consumed during the reaction b It offers an alternate, lower-energy pathway c It increases temperature 10 What is reaction rate? a How fast or slow a chemical reaction happens b The color of a chemical c The mass of a substance 11 Which of the following is a factor that affects reaction rate? a Temperature b color c shape of the container 12 What happens to the reaction rate when temperature increases? a It slows down b It stays the same c It speeds up 13 What happens to the reaction rate when temperature decreases? a It speeds up b It slows down c It stops completely 14 What does surface area refer to? a The exposed area of a solid reactant b The weight of a reactant c The color of a reactant 15 Which reacts faster with acid? a A large marble chip b Powdered marble c Both react at the same rate 16 Why does powdered material react faster? a It is heavier b It has more exposed surface area c It is colder 17 What is concentration? a The amount of reactant particles in a given volume b The temperature of a solution c The color of a solution 18 What happens when the concentration of reactants increases? a Fewer particles are present b The reaction stops c More particle collisions occur 19 If the concentration of hydrochloric acid is doubled, the reaction rate will: a Increase b Decrease c Stay the same 20 What is a catalyst? a A substance that slows down a reaction b A reaction product c A substance that speeds up a reaction without being used up 21 How does a catalyst help a reaction? a It provides an alternative pathway with lower activation energy b It removes the reactants c It lowers the temperature 22 Which of the following is a biological catalyst? a Water b Enzyme c Salt 23 Yeast used in bread making is an example of a: a Catalyst b Temperature c Reactant 24 If magnesium is broken into smaller pieces, the reaction rate will: a decrease b increase c remain unchanged 25 What does the nature of reactants refer to? a volume of a container b properties and characteristics of substances in a reaction c color of reactants 26 What happens to particles when temperature increases? a They stop moving b They disappear c They move faster 27 Why do reactions happen faster at higher temperatures? a Particles move faster and collide more often b There are fewer collisions c Particles become larger 28 Which condition helps slow down food spoilage? a High temperature b Refrigeration c Direct sunlight 29 A student wants to make a marble chip react faster with hydrochloric acid. Which action would be the BEST choice? a Use a larger marble chip b Lower the temperature of the acid c Crush the marble chip into powder 30 Two experiments use the same reactants. In Experiment A, the reactants are heated. In Experiment B, a catalyst is added. Both reactions become faster. What can you conclude? a Both temperature and catalysts can increase reaction rate b Only temperature affects reaction rate c Catalysts slow down reactions 31 A food company wants to keep its products fresh for a longer time. Based on your knowledge of reaction rates, what is the BEST method? a Keep the products in direct sunlight b Store the products in a refrigerator c Place the products near a heat source

Reaction Rate Factors Quiz

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Reaction Rate Factors QuizVersion en ligne

par Donna Alyza Yaun

Which factor increases reaction rate mainly by raising collision frequency among particles?

How does increasing surface area affect a reaction rate?

What is the effect of higher temperature on reaction rate?

Which statement best describes the effect of the nature of reactants on rate?

What role does a catalyst play in a reaction rate?

If reactants are more concentrated, the rate usually:

Which factor is not directly about particle energy or collisions?

Nature of reactants affects rate because:

Why does a catalyst increase the rate without being consumed?

What is reaction rate?

Which of the following is a factor that affects reaction rate?

What happens to the reaction rate when temperature increases?

What happens to the reaction rate when temperature decreases?

What does surface area refer to?

Which reacts faster with acid?

Why does powdered material react faster?

What is concentration?

What happens when the concentration of reactants increases?

If the concentration of hydrochloric acid is doubled, the reaction rate will:

What is a catalyst?

How does a catalyst help a reaction?

Which of the following is a biological catalyst?

Yeast used in bread making is an example of a:

If magnesium is broken into smaller pieces, the reaction rate will:

What does the nature of reactants refer to?

What happens to particles when temperature increases?

Why do reactions happen faster at higher temperatures?

Which condition helps slow down food spoilage?

A student wants to make a marble chip react faster with hydrochloric acid. Which action would be the BEST choice?

Two experiments use the same reactants. In Experiment A, the reactants are heated. In Experiment B, a catalyst is added. Both reactions become faster. What can you conclude?

A food company wants to keep its products fresh for a longer time. Based on your knowledge of reaction rates, what is the BEST method?