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 oxide.
Calcium hydroxide.
Calcium carbonate.

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

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

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

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

Question 4. What is formed when we add any carbonate to an acid?

A salt and carbon dioxide.
An alkaline solution.
A salt and hydrogen.
Hydrogen and carbon dioxide.

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


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