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The most abundant element in the earth's crust is ?

  • Aluminium
  • Nitrogen
  • Silicon
  • Oxygen

Answer: Option D

Similar Questions :

1. Iodine can be separated from a mixture of Iodine and Potassium Chloride by ?

  • Filtration
  • Sublimation
  • Distillation
  • Sedimentation

Answer: Option B

2. Homo nuclear molecules contain ?

  • polar bond
  • covalent bond
  • ionic bond
  • coordinate bond

Answer: Option B

3. What is extracted from Bauxite ?

  • Mica
  • Aluminium
  • Copper
  • Tin

Answer: Option B

4. The nuclear particles which are assumed to hold the nucleons together are ?

  • positrons
  • neutrons
  • electrons
  • mesons

Answer: Option D

5. What is the hardest form of carbon ?

  • coke
  • graphite
  • charcoal
  • diamond

Answer: Option D

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