Question

Which is the ore of aluminium?

• A. Bauxite
• B. Calamine
• C. Haematite
• D. Magnetite

Answer 1

Answer:

A. Bauxite

Bauxite is indeed the primary ore of aluminum. It is a type of sedimentary rock that is rich in aluminum hydroxide (Al2O3·2H2O), which is the main source of aluminum.

Characteristics of Bauxite:

• Composition: Aluminum hydroxide, iron oxide, silicon dioxide, and titanium dioxide

• Appearance: Red or brown in color, with a earthy or clay-like texture

• Deposits: Found in tropical and subtropical regions, often in association with limestone and shale

Extraction of Aluminum from Bauxite:

The extraction of aluminum from bauxite involves several steps:

1. Mining: Bauxite is mined from open-pit or underground deposits.

2. Refining: The bauxite is refined to produce alumina (Al2O3), which is then smelted to produce pure aluminum.

Importance of Bauxite:

Bauxite is the primary source of aluminum, which is used in a wide range of applications, including:

• Aircraft and aerospace: Aluminum is used in the manufacture of aircraft and spacecraft due to its high strength-to-weight ratio.

• Automotive: Aluminum is used in the manufacture of vehicle parts, such as engine blocks and cylinder heads.

• Packaging: Aluminum is used in the manufacture of cans and foil for food and beverage packaging.

• Construction: Aluminum is used in the manufacture of building materials, such as window frames and roofing.