Catalysts and Reaction Rates

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

• It is consumed completely during the reaction.

• It slows down the reaction.

• It speeds up the reaction without being consumed.

• It has no effect on the reaction rate.

What is often reduced when catalysts are used in chemical reactions?

• Reaction speed

• Activation energy and CO2 emissions

• The amount of products formed

• The temperature of the surroundings

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NGSS.HS-PS1-5

How do catalysts affect industrial processes?

• They increase energy demand and CO2 emissions.

• They have no impact on industrial processes.

• They reduce the need for raw materials.

• They often require lower temperatures and reduce energy demand and CO2 emissions.

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NGSS.HS-ETS1-3

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What is the effect of having a greater proportion of molecules with energy greater than or equal to activation energy on the rate of reaction?

• It decreases the rate of reaction.

• It does not affect the rate of reaction.

• It increases the rate of reaction.

• It changes the products of the reaction.

Tags

NGSS.HS-PS1-5

How do catalysts increase the rate of a chemical reaction?

• By being consumed in the reaction.

• By providing a higher activation energy for the reaction.

• By providing an alternative route for the reaction with a lower activation energy.

• By changing the products of the reaction.

Tags

NGSS.HS-PS1-5

Which catalyst is used in ammonia production?

• Ziegler Natta catalyst

• Iron

• Platinum

• Palladium

What is the Ziegler Natta catalyst used for?

• Ammonia production

• Poly(ethene) production

• Catalytic converters

• None of the above

Which of the following metals are used in catalytic converters?

• Iron, Ziegler Natta, and Platinum

• Palladium, Rhodium, and Iron

• Platinum, Palladium, and Rhodium

• Ziegler Natta, Palladium, and Rhodium

What is one of the benefits of using lower temperatures and pressures in chemical reactions?

• Increases energy demand

• Increases carbon dioxide emissions

• Reduces energy demand and carbon dioxide emissions

• Increases production costs

How can different reactions with better atom economy impact the environment?

• They increase energy consumption

• They lead to higher carbon emissions

• They reduce waste

• They have no impact on the environment

Tags

NGSS.HS-ESS3-4

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