Asbestos . . . . . . . . A. Is a natural fibrous mineral substance B. Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3) C. Contains iron oxide and alumina D. All the above

Is a natural fibrous mineral substance
Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)
Contains iron oxide and alumina
All the above

The correct answer is D. All of the above.

Asbestos is a natural fibrous mineral substance that is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3). It also contains iron oxide and alumina. Asbestos is a very durable material that is resistant to heat, fire, and electricity. It has been used in a variety of products, including insulation, roofing, and fireproofing. However, asbestos is a known carcinogen and can cause serious health problems if it is inhaled. As a result, the use of asbestos has been banned in many countries.

Option A is correct because asbestos is a natural fibrous mineral substance. Option B is correct because asbestos is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3). Option C is correct because asbestos contains iron oxide and alumina. Therefore, the correct answer is D. All of the above.

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