Multiple choice

This group of alumino-silicate minerals is widely used in making electrical insulation.

  1. Bauxite

  2. Chromites

  3. Manganese

  4. Mica
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D Correct answer
Explanation

Mica is an alumino-silicate mineral group widely used in electrical insulation due to its excellent dielectric properties, heat resistance, and ability to be split into thin sheets. Bauxite is an aluminum ore, chromites are chromium ores used for metal production, and manganese is a metallic element.

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