Limestone Cycle and Its Applications

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 organisms and its uses. The thermal decomposition of limestone into quick lime and carbon dioxide is discussed, followed by the exothermic reaction of quick lime with water to form slaked lime. The cycle completes with lime water reacting with carbon dioxide to form calcium carbonate, 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 volcanic activity

• By the compression of marine organisms

• By the erosion of mountains

• By the evaporation of seawater

What is the chemical name for quick lime?

• Calcium oxide

• Calcium carbonate

• Calcium sulfate

• Calcium hydroxide

What type of reaction is the thermal decomposition of limestone?

• Catalytic

• Neutral

• Endothermic

• Exothermic

What is the industrial process of reacting quick lime with water called?

• Oxidation

• Calcination

• Slaking

• Hydration

What is formed when quick lime reacts with water?

• Calcium hydroxide

• Calcium sulfate

• Calcium chloride

• Calcium carbonate

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

• It forms calcium sulfate.

• It turns clear again.

• It forms calcium oxide.

• It remains milky.

What is the main component of limestone?

• Calcium sulfate

• Calcium oxide

• Calcium hydroxide

• Calcium carbonate

What is the Limestone cycle primarily about?

• The use of limestone in construction

• The erosion of limestone

• The transformation of limestone into various calcium compounds

• The formation of calcium sulfate