Snapquiz - The Limestone Cycle

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

Question 1. What is formed when we strongly heat limestone?

Calcium carbonate.
Calcium hydroxide.
Calcium oxide.

Question 2. What is the standard test for carbon dioxide?

Introduce a smouldering wooden spill, and it will reignite.
Add it to water, and it will raise the pH of the water.
Attempt to light it with a lit wooden spill, and it will cause a "squeaky pop" noise.
Bubble it through limewater, where it will form a white calcium carbonate precipitate.

Question 3. The formation of calcium hydroxide is exothermic. What does "exothermic" mean?

It doesn't change in temperature.
It absorbs heat.
It releases heat.
It only happens when it's heated.

Question 4. What is the important compound found in limestone?

Calcium hydroxide.
Calcium carbonate.
Calcium oxide.

Question 5. Which of the following elements will form a carbonate?


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