Pick up the correct statement from the following: A. Slaked lime contains calcium hydroxide B. Quick lime contains calcium oxide C. Slaked lime may be obtained from quick lime D. All the above

The correct answer is D. All the above.

Slaked lime is a white, powdery substance that is produced by adding water to quicklime. It is also known as calcium hydroxide or hydrated lime. Quicklime is a white, caustic solid that is produced by heating limestone. It is also known as calcium oxide or lime. Slaked lime may be obtained from quick lime by adding water to it. The reaction is as follows:

CaO + H2O → Ca(OH)2

Slaked lime is used in a variety of applications, including:

• Construction: It is used as a binder in concrete and mortar.
• Agriculture: It is used to neutralize acidity in soil and to improve crop yields.
• Water treatment: It is used to remove impurities from water.
• Papermaking: It is used to make paper pulp.
• Cosmetics: It is used in some toothpastes and soaps.

Quicklime is used in a variety of applications, including:

• Steelmaking: It is used to remove impurities from iron ore.
• Cement production: It is used to make cement.
• Glassmaking: It is used to make glass.
• Agriculture: It is used to neutralize acidity in soil and to improve crop yields.
• Wastewater treatment: It is used to remove impurities from wastewater.

I hope this helps! Let me know if you have any other questions.