Multiple choice

Asbestos is a fibrous silicate mineral mainly of

  1. calcium and zinc

  2. copper, zinc and magnesium

  3. calcium and magnesium

  4. lead and iron
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Asbestos minerals are primarily silicates of magnesium (e.g., chrysotile is Mg3Si2O5(OH)4). While magnesium is correct, calcium is not a major component of asbestos - this appears to be an error in the question or answer key. Among the given options, C is the closest to being correct since it includes magnesium, but scientifically, magnesium silicate alone would be more accurate.

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