Chemistry – Ores And Minerals

1. What is the correct sequence for the abundance of elements in decreasing order within Earth’s crust?

  1. Hydrogen > Nitrogen > Carbon > Oxygen
  2. Silicon > Aluminium > Iron> Oxygen
  3. Iron> Aluminium> Silicon> Oxygen
  4. Oxygen > Silicon > Aluminium > Iron
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Answer: Option D. Oxygen > Silicon > Aluminium > Iron

2. Which among the following is not a non-metallic mineral?

  1. Quartz
  2. Feldspar
  3. Bauxite
  4. Mica
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Answer: Option C. Bauxite

3. Which of the following ores is not an oxide?

  1. Galena
  2. Hematite
  3. Bauxite
  4. Cuprite
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Answer: Option A. Galena

4. Which of the following statements correctly describes minerals and ores?

  1. All minerals are ores
  2. Ores are rocks that do not contain any valuable substances
  3. All Ores are types of minerals that contain valuable substances
  4. Minerals cannot be found in ores
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Answer: Option C. All Ores are types of minerals that contain valuable substances

5. Carnotite is a mineral of which of the following metals?

  1. Uranium
  2. Gold
  3. Iron
  4. Copper
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Answer: Option A. Uranium