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12th Standard English Medium Chemistry Subject p - Block Elements - I Creative 1 Mark Questions with Solution Part - II

12th Standard

    Reg.No. :
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Chemistry

Time : 00:30:00 Hrs
Total Marks : 5
    5 x 1 = 5
  1. Elements of group 13 mainly form covalent compounds because ______

    (a)

    small size

    (b)

    electro negativity values are high

    (c)

    ionization energy is very high

    (d)

    both (a) and (c)

  2. All elements except carbon have the tendency to show maximum covalency of six ______

    (a)

    due to presence of vacant d-orbitals

    (b)

    due to absence of vacant d-orbitals

    (c)

    due to presence of partially filled d-orbitals

    (d)

    due to presence of completely filled d-orbitals

  3. Group 14 elements have general electronic configuration _______.

    (a)

    ns2

    (b)

    ns2np4

    (c)

    ns2np6

    (d)

    ns2np2

  4. The silicates which contain discrete tetrahedral units are _______.

    (a)

    ortho silicates

    (b)

    sheet silicates

    (c)

    pyrosilicates

    (d)

    three dimensional silicates

  5. Borax is _______.

    (a)

    Na2[B4O5(OH)4).8H2O

    (b)

    Na2[B4O5(OH)6).7H2O

    (c)

    Na2[B4O3(OH)8].6H2O

    (d)

    Na2[B4O2(OH)10).5H2O

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