0%
  • Naturally occurring substances or minerals from which metals can be conveniently and economically extracted is ______.

    ;i:2;s:4:
    ;i:1;s:8:
    ;i:3;s:13:
  • The molecular formula of iron is ______.

    FeO
    Fe
    FeS
    Fe2O
  • The valencies of iron are ______.

    1 and 2
    3 and 4
    2 and 3
    1
  • These are the ores of iron ______.

    hematite
    magnetide
    iron pyrite
    All the answers are correct
  • The atomic number of iron is ______.

    25
    26
    22
    24
  • The atomic weight of iron is ______.

    56
    54
    55
    53
  • Iron belongs to ______ of periodic table.

    Group VI
    Group VII
    Group zero
    Group VIII
  • Iron is known as ______.

    none of above
    s block element
    p block element
    d block element
  • The electronic configuration of iron is

    1s2,2s2,2p6,3s2,3p6,4s2,4p6,3d6
    1s2,2s2,2p6,4p6,3d6
    none of above
    1s2,2s2,2p6,3s2,4s2,4p6
  • You scored /9


    Take test again