Question

The chemical name of quick lime (Chuna) is
1. Calcium Hydroxide
2. Calcium Oxide
3. Calcium Carbonate
4. Calcium Sulphate

Answer 1

Correct Answer - Option 2 : Calcium Oxide

The correct answer is Calcium Oxide.

• Calcium oxide, commonly known as lime, is a chemical compound with the formula CaO.
• Calcium oxide, also known as quicklime. It is believed that quicklime is one of the oldest chemicals known to the human race. It can also be referred to as burnt lime or lime.
• Calcium oxide can be produced by the thermal decomposition of materials like limestone or seashells that contain calcium carbonate (CaCO₃ mineral calcite) in a lime kiln.
• The process that is used to prepare burnt lime is known as calcination. It is a process that starts with thermally decomposing the reactants at high temperatures but ensuring that the temperature is kept well below the melting point.

• Sodium Bicarbonate:
  • ​Sodium bicarbonate, referred to as baking soda, is primarily used in baking as a leavening agent.
  • It reacts with acidic components in batters, releasing carbon dioxide, which causes expansion of the batter and forms the characteristic texture and grain in pancakes, cakes, quick bread, soda bread, and other baked and fried foods.
• Calcium carbonate:
  • It is an inorganic chemical compound with the chemical formula CaCO₃.
  • Calcium carbonate is a non-toxic and odourless compound commonly found as a white mineral that occurs naturally in chalks, limestones, and marbles.
• Silicon Dioxide:
  • ​SiO2 is an oxide of silicon with the chemical name Silicon Dioxide.
  • It is also called Silica or Silicic oxide or silicic acid.
  • It is widely found in nature as quartz.