Snapquiz - Collision Theory

Question 1. Some catalysts are very expensive. Why is it still economical to use them in some cases?

They aren't used up in a reaction.
The manufacturers can buy them cheaper in bulk.
They're the only way to manufacture a product.
If they weren't used for the reaction they would just go to waste.

Question 2. Which conditions would give the slowest reaction?

A 30°C starch solution with a 5% amylase solution.
A 5°C starch solution with a 5% amylase solution.
A 30°C starch solution with a 20% amylase solution.
A 5°C starch solution with a 20% amylase solution.

Question 3. Why can't we use the same catalyst (i.e. enzyme) to break down fats as we use to break down starches?

Catalysts are not soluble in fats.
Catalysts are too rare to use for several different reactions.
Catalysts only work for very specific reactions.
Catalysts are too expensive to use for more than one reaction.

Question 4. Why does adding a catalyst increase the rate of reaction?

There's more chance of particles colliding because there's a greater area for them to come into contact.
There's more chance of particles colliding because there's more of them in a given volume.
There's more chance of particles colliding because they're moving faster.
There's more chance of particles colliding because there's a place for them to meet.

Question 5. Why are catalysts desirable to manufacturers?

They increase the cost, making the products more valuable.
They slow the rate of a reaction, allowing it to be carefully controlled.
They allow reactions to happen more safely.
They allow reactions to happen at lower temperatures, reducing heating costs.

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