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

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

12th Standard

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Chemistry

Time : 00:30:00 Hrs
Total Marks : 5
    5 x 1 = 5

  1. The stability of +1 oxidation state among Al, Ga, In and Tl increases in sequence _______.

    (a)

    TI < In < Ga < Al

    (b)

    In < TI < Ga < Al

    (c)

    Ga < In < Al < TI

    (d)

    Al < Ga < In < TI

  2. Chemical formula of phosgene is_______.

    (a)

    COCl2

    (b)

    CaOCl2

    (c)

    CaCO3

    (d)

    COCI

  3. SiO44- ion has ____ geometry.

    (a)

    Triangular

    (b)

    Tetrahedral

    (c)

    Linear

    (d)

    Pentagonal bipyramidal

  4. Which of the following oxide is amphoteric?

    (a)

    SiO2

    (b)

    CO2

    (c)

    SnO2

    (d)

    CaO

  5. Which of the following statements about H3BO3 is not correct?

    (a)

    It has a layer structure in which planar BO3 units are joined by H-bonds

    (b)

    It is a strong tribasic acid

    (c)

    It is prepared by acidifying an aqueous solution of borax

    (d)

    It does not act as proton donor but acts as lewis acid by accepting hydroxyl ion

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