Snapquiz - Collision Theory

This is the Snapquiz on Collision Theory. Click here or use the embedded video if you haven't watched the lesson yet.


Question 1. Why are catalysts desirable to manufacturers?

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


Question 2. Why does increasing temperature increase the rate of reaction?

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


Question 3. Why does a spoonful of granulated sugar dissolve more quickly than a sugar lump of equal mass?

People stir their drinks more when they use granulated sugar.
It raises the temperature of the liquid.
The particles can move faster.
It has greater surface area.


Question 4. Which conditions would give the fastest reaction?

A 1 gram iron nail in 0.5 molar acid.
1 gram of iron filings in 1.0 molar acid.
A 1 gram iron nail in 1.0 molar acid.
1 gram of iron filings in 0.5 molar acid.


Question 5. Some catalysts are very expensive. Why is it still economical to use them in some cases?

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


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