Correct Answer - Option 4 : CaO
The Correct Answer i.e Calcium oxide (CaO).
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Calcium oxide (CaO):
- It is commonly known as Quick lime or burnt lime.
- It is commonly used in making porcelain and glass and also in preparing bleaching powder, etc.
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Calcium carbonate (CaCO3):
- It is also known as chalk.
- Calcium carbonate is used as an antacid to relieve heartburn, acid indigestion, etc.
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Calcium chloride (CaCl2):
- It is used in the production of activated charcoal and used as an electrolyte in sports drinks.
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Calcium hydroxide Ca(OH)2:
- It is also known as slaked lime.
- It is used in sewage treatment, paper production, and food processing, etc.
Some common chemical compounds with their common names are:
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Chemical Compounds
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Common Names
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Chemical Formulas
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Sodium Bicarbonate
|
Baking Soda
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NaHCO3
|
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Calcium ChlorohypoChlorite
|
Bleaching Powder
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Ca(ClO)2
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Sodium Hydroxide
|
Caustic Soda
|
NaOH
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Sodium Carbonate
|
Washing Soda
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Na2CO3 .10 H2O
|
|
Carbon Dioxide
|
Dry Ice
|
CO2
|
|
Copper Sulphate
|
Blue Vitriol
|
CuSO4
|
|
Ferrous Sulphate
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Green Vitriol
|
FeSO4
|
|
Sulphuric Acid
|
Oil of vitriol
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H2SO4
|
|
Calcium Sulphate Hemihydrate
|
Plaster of Paris
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(CaSO4. 1/2H2O)
|
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Calcium Sulphate Dihydrate
|
Gypsum
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CaSO4.2H2O
|
|
Calcium Hydroxide
|
Slaked Lime
|
Ca(OH)2
|
|
Sodium nitrate
|
Chile Saltpeter
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NaNO3
|
|
Potassium nitrate
|
Saltpetre
|
KNO3
|
|
Hydrochloric acid
|
Muriatic acid
|
HCl
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