Limestone and Lime Chemistry Concepts

The video tutorial explains the test for carbon dioxide using lime water, which turns milky due to calcium carbonate formation. It introduces limestone, a sedimentary rock rich in calcium carbonate, formed from compressed marine deposits. The limestone cycle is detailed, showing how limestone decomposes to quicklime and carbon dioxide, and how quicklime reacts with water to form slaked lime. Slaked lime dissolves in water to form lime water, which reacts with carbon dioxide to reform calcium carbonate, completing the cycle. The tutorial highlights limestone's uses and the chemical reactions involved in its cycle.

What happens when carbon dioxide is passed through lime water?

• It forms calcium hydroxide.

• It turns lime water milky.

• It turns lime water clear.

• It forms calcium oxide.

What is limestone primarily composed of?

• Calcium sulfate

• Calcium carbonate

• Calcium hydroxide

• Calcium oxide

How is limestone formed over millions of years?

• By volcanic activity

• By the evaporation of seawater

• By the compression of marine organism deposits

• By the erosion of mountains

What is the chemical name for quicklime?

• Calcium oxide

• Calcium hydroxide

• Calcium sulfate

• Calcium carbonate

What type of reaction is the thermal decomposition of limestone?

• Catalytic

• Exothermic

• Neutral

• Endothermic

What is produced when quicklime reacts with water?

• Calcium carbonate

• Lime water

• Calcium sulfate

• Slaked lime

What is the industrial process of producing slaked lime called?

• Slinking

• Slaking

• Sleeking

• Slicking

What happens when excess carbon dioxide is passed through lime water?

• It forms calcium sulfate.

• It forms calcium oxide.

• It turns clear again.

• It remains milky.

What is the main component of limestone?

• Calcium oxide

• Calcium hydroxide

• Calcium carbonate

• Calcium sulfate

Which of the following is not part of the limestone cycle?

• Quicklime

• Calcium sulfate

• Slaked lime

• Lime water