4. Write a note on calcium
carbonate and calcium oxide.
pls its very important
Answers
Answer:
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Explanation:
Calcium oxide or lime is prepared by the process called calcination. Calcium carbonate or Limestone is heated to a temperature between 1250 ⁰C and 1400 ⁰C in Kilns (oven) and it decomposes to quicklime and carbon dioxide.
Formula: CaO
Melting point: 2,572°C (4,661°F)
State: Solid
Answer:
Calcium carbonate
It is a chemical compound with the chemical formula CaCO3. It is a white insoluble powder-like substance which occurs naturally in minerals, chalk, marble, limestone, calcite, shells, pearl, etc. Medicinally, it is used as an antacid or as a calcium supplement.
Calcium Oxide
Calcium oxide, also known as quicklime, is an alkaline substance that has been in use since the medieval age. 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.
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