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  • Question
  • The most electronegative element among the following is


  • Options
  • A. sodium
  • B. bromine
  • C. fluorine
  • D. oxygen

  • Correct Answer
  • fluorine 


  • Chemistry problems


    Search Results


    • 1. The first metal used by man was

    • Options
    • A. iron
    • B. copper
    • C. gold
    • D. bronze
    • Discuss
    • 2. Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be

    • Options
    • A. 2 : 16 : 2
    • B. 2 : 16 : 1
    • C. 1 : 16 : 2
    • D. 1 : 1 : 1
    • Discuss
    • 3. The major constituent of air is

    • Options
    • A. nitrogen
    • B. carbon dioxide
    • C. oxygen
    • D. hydrogen
    • Discuss
    • 4. The main active constituent of tea and coffee is

    • Options
    • A. nicotine
    • B. chlorophyll
    • C. caffeine
    • D. aspirin
    • Discuss
    • 5. The metal used to recover copper from a solution of copper sulphate is

    • Options
    • A. Na
    • B. Ag
    • C. Hg
    • D. Fe
    • Discuss
    • 6. The mass of one Avogadro number of helium atom is

    • Options
    • A. 1.00 gram
    • B. 4.00 gram
    • C. 8.00 gram
    • D. 4 x 6.02 x 1023 gram
    • Discuss
    • 7. The National Chemical Laboratory is situated in

    • Options
    • A. New Delhi
    • B. Bangalore
    • C. Pune
    • D. Patna
    • Discuss
    • 8. The ionic radii of N3-, O2-, F- and Na+ follows the order

    • Options
    • A. N3- > O2- > F- > Na+
    • B. N3- > Na+ > O2- > F-
    • C. Na+ > O2- > N3- > F-
    • D. O2- > F- > Na+ > N3-
    • Discuss
    • 9. The monomer of polythene is

    • Options
    • A. vinyl chloride
    • B. ethylene
    • C. ethyl alcohol
    • D. None of the above
    • Discuss
    • 10. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

    • Options
    • A. liquation
    • B. leaching
    • C. levigation
    • D. magnetic separation
    • Discuss


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