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Transition and Inner Transition Elements 1 Mark Creative Question Paper With Answer Key

12th Standard

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Chemistry

Time : 00:15:00 Hrs
Total Marks : 15

     Multiple Choice Question 

    15 x 1 = 15
  1. Which of the following compounds is colourless?

    (a)

    Fe3+

    (b)

    Ti4+

    (c)

    Co2+

    (d)

    Ni2+

  2. The alloy of copper that contain Zinc is________.

    (a)

    Monel metal

    (b)

    Bronze

    (c)

    bell metal

    (d)

    brass

  3. Which of the following does not give oxygen on heating?

    (a)

    K2Cr2O7

    (b)

    (NH4)2Cr2O7

    (c)

    KClO3

    (d)

    Zn(ClO3)2

  4. A white crystalline salt (A) react with dilute HCl to liberate a suffocating gas (B) and also forms a yellow precipitate. The gas (B) turns potassium dichromate acidified with dil H2SO4 to a green coloured solution(C).  A, B and C are respectively ________.

    (a)

    Na2SO3, SO2, Cr2(SO4)3

    (b)

    Na2S2O3, SO2, Cr2(SO4)3

    (c)

    Na2S, SO2, Cr2(SO4)3

    (d)

    Na2SO4, SO2, Cr2(SO4)3

  5. MnO4- react with Br- in alkaline PH to give ________.

    (a)

    BrO3- MnO2

    (b)

    Br2, MnO42-

    (c)

    Br2, MnO2

    (d)

    BrO-, MnO42-

  6. When a brown compound of Mn (A) is treated with HCl, it gives a gas (B). The gas (B) taken in excess reacts with NH3 to give an explosive compound (C). The compound A, B and C are ________.

    (a)

    MnO2, Cl2, NCl3

    (b)

    MnO, Cl2, NH4Cl

    (c)

    Mn3O4, Cl2, NCl3

    (d)

    MnO3, Cl2, NCl2

  7. The catalytic activity of transition metals is due to ________.

    (a)

    the formation of a variety of oxidation states

    (b)

    the formation of intermediate products

    (c)

    the capability of forming interstitial compounds.

    (d)

    all the above

  8. Most of the transition metal ions are coloured, because of the ________.

    (a)

    presence of unpaired electrons

    (b)

    energy gap between two energy levels is very small

    (c)

    both (a) and (b)

    (d)

    neither (a) nor (b)

  9. Which of the following is wrong with respect to lanthanide contraction?

    (a)

    Decrease in ionic radii

    (b)

    Increase in tendency to act as reducing agents

    (c)

    Decrease in basic character

    (d)

    Resembles second and third row of d-block elements

  10. Hybridisation of chromium ions and dichromate ions is ________.

    (a)

    Sp2

    (b)

    Sp3d

    (c)

    both (a) and (b)

    (d)

    None of these

  11. The highest possible oxidation state shown by osmium in its compound is_______.

    (a)

    +4

    (b)

    +6

    (c)

    +8

    (d)

    +10

  12. Identify the paramagnetic species.

    (a)

    Cu+

    (b)

    Cr+

    (c)

    MnO4

    (d)

    Zn2+

  13. The trend in ionisation enthalpy of a transition element is not regular because,_______.

    (a)

    removal of one electron alters the relative energies of 4s and 3d orbitals

    (b)

    due to different electronic configuration (stability)

    (c)

    Poor screening of 3p-orbital

    (d)

    due to decrease in effective nuclear charge

  14. Oxygen stabilises higher oxidation state because_______.

    (a)

    it is electronegative

    (b)

    of its tendency to form multiple bond

    (c)

    of large size

    (d)

    of small size

  15. Which one of the following exhibits highest oxidation state?

    (a)

    Ni

    (b)

    Mn

    (c)

    V

    (d)

    Zr

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