p - Block Elements - II One Mark Questions

12th Standard EM

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Chemistry

Time : 00:30:00 Hrs
Total Marks : 20
    15 x 1 = 15
  1. In which of the following , NH3 is not used?

    (a)

    Nessler’s reagent

    (b)

    Reagent for the analysis of IV group basic radical

    (c)

    Reagent for the analysis of III group basic radical

    (d)

    Tollen’s reagent

  2. Which is true regarding nitrogen?

    (a)

    least electronegative element

    (b)

    has low ionisation enthalpy than oxygen

    (c)

    d- orbitals available

    (d)

    ability to form pπ-pπ bonds with itself

  3. In the brown ring test, brown colour of the ring is due to

    (a)

    a mixture of No and NO2

    (b)

    Nitroso ferrous sulphate

    (c)

    Ferrous nitrate

    (d)

    Ferric nitra

  4. On hydrolysis, PCl3 gives

    (a)

    H3PO3

    (b)

    PH3

    (c)

    H3PO4

    (d)

    POCl3

  5. P4O6 reacts with cold water to give

    (a)

    H3PO3

    (b)

    H4P2O7

    (c)

    HPO3

    (d)

    H3PO4

  6. Among the following, which is the strongest oxidizing agent?

    (a)

    Cl2

    (b)

    F2

    (c)

    Br2

    (d)

    l2

  7. The correct order of the thermal stability of hydrogen halide is

    (a)

    HI > HBr > HCl > HF

    (b)

    HF > HCl > HBr > HI

    (c)

    HCl > HF > HBr > HI

    (d)

    HI > HCl > HF > HBr

  8. Which one of the following compounds is not formed?

    (a)

    XeOF4

    (b)

    XeO3

    (c)

    XeF2

    (d)

    NeF2

  9. Most easily liquefiable gas is

    (a)

    Ar

    (b)

    Ne

    (c)

    He

    (d)

    Kr

  10. XeF6 on complete hydrolysis produces

    (a)

    XeOF4

    (b)

    XeO2F2

    (c)

    XeO3

    (d)

    XeO2

  11. Which of the following is correct?

    (a)

    H3PO3 is dibasic and reducing

    (b)

    H3PO3 is dibasic and non-reducing

    (c)

    H3PO4 is tribasic and reducing

    (d)

    H3PO3 is tribasic and non-reducing

  12. Catenation property of group 15 elements, follow the order

    (a)

    N < P < As < Sb < Bi

    (b)

    P >> N > As > Sb > Bi

    (c)

    P < N < As < Sb < Bi

    (d)

    N>> P > As > Sb > Bi

  13. Which of the following halides of group 15 is not hydrolysed?

    (a)

    NF3

    (b)

    PF3

    (c)

    NI3

    (d)

    Both (a) and (b)

  14. Which is dibasic?

    (a)

    Orthophosphoric acid

    (b)

    Pyrophosphoric acid

    (c)

    Orthophosphorus acid

    (d)

    Hypophosphorus acid

  15. Thr hybridisation and shape of SF6 is respectively?

    (a)

    sp3d2,square planar

    (b)

    sp3d2,octahedral

    (c)

    sp3d see-saw

    (d)

    sp3d,trigonal bipyramindal

  16. 5 x 1 = 5
  17. XeF6

  18. (1)

    Square planar

  19. XeO3

  20. (2)

    Linear

  21. XeOF4

  22. (3)

    Square Pyramidal

  23. XeF4

  24. (4)

    Distorted Octahedral

  25. AX

  26. (5)

    Pyramidal

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