Limestone and Carbon Dioxide Reactions

The video tutorial explains the test for carbon dioxide using lime water, which turns milky due to calcium carbonate formation. It introduces the limestone cycle, detailing limestone's formation from marine deposits and its uses. The thermal decomposition of limestone into quick lime and carbon dioxide is described, along with the reactions of quick lime and slaked lime. The cycle is completed by forming calcium carbonate from lime water and carbon dioxide, summarizing the limestone cycle's steps.

What happens when carbon dioxide is passed through lime water?

• It forms calcium oxide.

• It forms calcium hydroxide.

• It turns lime water milky.

• It turns lime water clear.

What is limestone primarily composed of?

• Calcium hydroxide

• Calcium sulfate

• Calcium carbonate

• Calcium oxide

How is limestone formed over millions of years?

• By the evaporation of seawater

• By the erosion of mountains

• By the compression of dead marine organisms

• By volcanic activity

What is the chemical name for quick lime?

• Calcium carbonate

• Calcium hydroxide

• Calcium oxide

• Calcium sulfate

What type of reaction is the thermal decomposition of limestone?

• Neutral

• Catalytic

• Endothermic

• Exothermic

What is produced when quick lime reacts with water?

• Slaked lime

• Lime water

• Calcium carbonate

• Calcium sulfate

What is the industrial process of forming slaked lime called?

• Slaking

• Decomposition

• Calcination

• Hydration

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

• It turns clear again.

• It forms calcium sulfate.

• It forms calcium oxide.

• 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?

• Calcium sulfate

• Lime water

• Slaked lime

• Quick lime