NCERT Class 10 Geography Solutions: Chapter 5 Minerals and Energy Resources (Contemporary India – II) Part 1

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Q - 1. Multiple choice questions

Question I. Which one of the following minerals is formed by decomposition of rocks, leaving a residual mass of weathered material?

  1. Coal

  2. Bauxite

  3. Gold

  4. zinc

Answer: B

Explanation:

  • Bauxite is an aluminum ore which is world's main source of aluminum.

  • It is made of the minerals gibbsite (Al(OH)3), boehmite (γ-AlO(OH)) and diaspore (α-AlO(OH)), mixed with the two iron oxides goethite and haematite, the clay mineral kaolinite and small amounts of anatase (TiO2) and ilmenite (FeTiO3 or FeO.TiO2).

  • It is mostly formed by decomposition of surface rocks and removal of soluble constituents leaves a residual mass of weathered material.

    One type of minerals

    One Type of Minerals

    One type of minerals

  • Coals are founded in sedimentary rocks.

  • Zink are formed when the minerals contained in liquid and gaseous are forced upwards to the surface of earth by cavities.

  • Gold is mostly found in sands of valley floors and at the base of hills.

Question II. Koderma, in Jharkhand is the leading producer of which one of the following minerals?

  1. Bauxite

  2. Mica

  3. Iron ore

  4. Copper

Answer: B

Explanation:

  • The mica is a natural mineral which is occur by collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water.

  • It is mostly found in the thin-sheet like or plate-like structure with various composition and physical properties is present.

Natural mineral Mica

Natural Mineral Mica

Natural mineral Mica

Koderma Jharkhand lead Producer of Mica

Koderma Jharkhand Lead Producer of Mica

Koderma Jharkhand lead Producer of Mica

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