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  • Question
  • Which of the following green house gases has the greatest heat-trapping ability?


  • Options
  • A. Chlorofluoro carbon
  • B. Methane
  • C. Carbon dioxide
  • D. Nitrous oxide

  • Correct Answer
  • Chlorofluoro carbon 

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    Chemistry problems


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    • 1. Glycol is used to manufacture which of the following ?

    • Options
    • A. Nylon
    • B. Artificial silk
    • C. Terylene
    • D. Rubber
    • Discuss
    • 2. 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
    • 3. Chemical properties of isotopes .............

    • Options
    • A. must be same
    • B. must be different
    • C. need not be same
    • D. need not be different
    • Discuss
    • 4. Limestone is a raw material used by which industry?

    • Options
    • A. Aluminium
    • B. Fertilizers
    • C. Cement
    • D. Petrochemicals
    • Discuss
    • 5. What is the name of the acid in grapes?

    • Options
    • A. Lactic acid
    • B. Formic acid
    • C. Acetic acid
    • D. Tartaric acid
    • Discuss
    • 6. Iron and manganese present as pollutants in water cannot be removed by_____

    • Options
    • A. oxidation followed by settling and filtration
    • B. chlorination
    • C. ion exchange process
    • D. lime soda process or manganese zeolite process
    • Discuss
    • 7. When iron rusts, its weight .....

    • Options
    • A. decreases
    • B. increases
    • C. remains the same
    • D. first increases and then decreases
    • Discuss
    • 8. Metals react with sodium hydroxide to produce ___________.

    • Options
    • A. oxygen gas
    • B. sodium
    • C. water
    • D. hydrogen gas
    • Discuss
    • 9. Magnesium (Mg) + Oxygen (O2) = ?

    • Options
    • A. Mg2O
    • B. MgO4
    • C. O2Mg
    • D. MgO
    • Discuss
    • 10. What is the reaction between an acid and a base called?

    • Options
    • A. Desalination
    • B. Crystallisation
    • C. Neutralisation
    • D. Sublimation
    • Discuss


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