The hybridization of orbitals of N atom in NO3-, NO2+ and NH4+ a

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 Multiple Choice QuestionsMultiple Choice Questions

1.

The species in which the N atom is in a state of sp hybridization is:

  • NO2-

  • NO3-

  • NO2

  • NO2

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2.

The ionic radii (in Å) of N3–, O2– and F are respectively:

  • 1.36, 1.40 and 1.71

  • 1.36, 1.71 and 1.40

  • 1.71, 1.40 and 1.36

  • 1.71, 1.40 and 1.36

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3.

In which of the following pairs of molecules/ions, both the species are not likely exist?

  • straight H subscript 2 superscript plus comma space He subscript 2 superscript 2 minus end superscript
  • straight H subscript 2 superscript minus comma space He subscript 2 superscript 2 minus end superscript
  • straight H subscript 2 superscript 2 plus end superscript comma He subscript 2
  • straight H subscript 2 superscript 2 plus end superscript comma He subscript 2
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4.

Which of the following exists as covalent crystals in the solid state?

  • Iodine

  • Silicon

  • Sulphur

  • Sulphur

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5.

Stability of the species Li2, Li2 and Li2+ increases in the order of:

  • Li2 < Li2+ < Li2-

  • Li2 < Li2+ < Li2 

  • Li2< Li2 < Li2+

  • Li2< Li2 < Li2+

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6.

In which of the following pairs the two species are not isostructural?

  • CO32- and NO3-

  • PCl+4 and SiCl4

  • PF5 and BrF5

  • PF5 and BrF5

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7.

Among the following, the maximum covalent character is shown by the compound

  • FeCl2

  • SnCl2

  • AlCl3

  • AlCl3

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8.

The hybridization of orbitals of N atom in NO3-, NO2+ and NH4+ are respectively

  • sp, sp2,sp3

  • sp2 , sp, sp

  • sp, sp3 , sp2

  • sp, sp3 , sp2


B.

sp2 , sp, sp

NO2+
Number of electron pairs = 2
Number of bond pairs = 2
Number of lone pair = 0
So, the species is linear with sp hybridisation.
NO3-
Number of electron pairs = 3
Number of bond pairs = 3
Number of lone pair = 0
So, the species is trigonal planar with sp2 hybridisation

NH4+
Number of electron pairs = 4
Number of bond pairs = 4
Number of lone pair = 0
So, the species is tetrahedral with sp3 hybridisation.

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9.

The group having isoelectronic species is

  • O2– , F, Na+ , Mg2+

  • O– , F, Na, Mg+

  • O2–, F, Na ,Mg2+

  • O2–, F, Na ,Mg2+

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10.

Using MO theory predict which of the following species has the shortest bond length?

  • O22+

  • O2+

  • O2

  • O2

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