Question
Download Solution PDFWhich of the following pair of compound name – formula is correct?
I. Calcium oxide – Ca2O
II. Aluminum Oxide – Al2O3
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Only II.
Key Points
- Calcium oxide (CaO), commonly known as quicklime or burnt lime, is a widely used chemical compound.
- It is a white, caustic, alkaline, crystalline solid at room temperature.
- Formula: CaO
- IUPAC ID: Oxocalcium
- Molar mass: 56.0774 g/mol
- Melting point: 2,572 °C
- Density: 3.34 g/cm³
- Soluble in: Water, Glycerol.
Thus I is incorrect.
- Aluminium oxide is a white odourless crystalline powder. It is water-insoluble.
- Aluminium oxide has a chemical formula of Al2O3.
- It is amphoteric in nature and is used in various chemical, industrial and commercial applications.
- An oxide of aluminium occurs in nature as various minerals such as bauxite, corundum, etc.
- It is used as an adsorbent, desiccating agent, and catalyst, and in the manufacture of dental cement and refractories.
Thus II is correct.
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