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  • Question
  • The oceanic crust mainly consists of silica and __________.


  • Options
  • A. magnesium
  • B. iron
  • C. manganese
  • D. sulphur

  • Correct Answer
  • magnesium 

  • Tags: Bank Exams

    Chemistry problems


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    • 1. Which of the following gas leaked in the Bhopal Gas tragedy in December 1984?

    • Options
    • A. Methyl isocyanate
    • B. Methyl isochlorate
    • C. Methyl Phosphate
    • D. Methyl Isopropate
    • Discuss
    • 2. Which among the following is used to generate light, to weld metals?

    • Options
    • A. Ethylene
    • B. Acetylene
    • C. Glycol
    • D. Oxalic acid
    • Discuss
    • 3. Atomic number of which of the following elements is greater than that of Copper?

    • Options
    • A. Iron
    • B. Chromium
    • C. Zinc
    • D. Manganese
    • Discuss
    • 4. ______ is used for making chemical apparatus like beakers, flasks etc.

    • Options
    • A. Potash glass
    • B. Hard glass
    • C. Jena glass
    • D. Soda glass
    • Discuss
    • 5. The nitrogenous waste of Human Beings is

    • Options
    • A. Ammonia
    • B. Urea
    • C. Ammonium Nitrate
    • D. Uric Acid
    • Discuss
    • 6. Magnesium oxide (MgO) + Water (H2O) = ?

    • Options
    • A. [Mg(OH)]
    • B. [Mg(O2H)2]
    • C. [Mg2(OH)]
    • D. [Mg(OH)2]
    • Discuss
    • 7. What is the name of the acid in grapes?

    • Options
    • A. Lactic acid
    • B. Formic acid
    • C. Acetic acid
    • D. Tartaric acid
    • Discuss
    • 8. Limestone is a raw material used by which industry?

    • Options
    • A. Aluminium
    • B. Fertilizers
    • C. Cement
    • D. Petrochemicals
    • Discuss
    • 9. Chemical properties of isotopes .............

    • Options
    • A. must be same
    • B. must be different
    • C. need not be same
    • D. need not be different
    • Discuss
    • 10. Sour taste of lemon is due to the presence of which of the following ?

    • Options
    • A. Citric acid
    • B. Acetic acid
    • C. Oxalic acid
    • D. Formic acid
    • Discuss


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