Important Questions of Chemical Bonding and Molecular Structure Chemistry | Zigya

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101.

Which of the following pair have identical bond order?

  • CN- and NO+

  • CN- and O2-

  • CN- and CN+

  • NO+ and O2-


102.

Hybridisation of carbon is CH3-

  • sp2

  • sp3

  • sp3d

  • sp3d2


103.

The common features among CO, CN- and NO2+ are

  • Bond order three and isoelectronic.

  • Bond order three and weak field ligands.

  • Bond order two and π-acceptors.

  • Bond order three and π-donors.


104.

Identify the T-shaped molecule from the following.

  • BF3

  • NH3

  • NF3

  • CIF3


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105.

Which one of the following molecules has the least dipole moment?

  • H2O

  • BeF2

  • NH3

  • NF3


106.

Dipole-dipole interaction energy between polar molecules in solids depends on the radius of the molecule (r) and it is directly proportional to

  • (1/r3)

  • (1/r6)

  • (1/r)

  • (1/r5)


107.

Which of the following changes in the respective bond order values are caused by removal of an electron from N2 and F2 molecules?

  • Decrease by 0.5 in both

  • Increase by 0.5 in both

  • Increase by 0.5 in the former and decrease by 0.5 in the latter

  • Decrease by 0.5 in the former and increase by 0.5 in the latter


108.

The hybridised state of bromine in bromine pentafluoride is

  • sp3d

  • dsp3

  • d2sp3

  • sp3d2


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109.

The correct ascending order of ligand field strength of the given ligands is

  • F- < I- < CN- < H2O < CO

  • I- < F- < H2O < CO < CN-

  • I- < F- < H2O < CN- < CO

  • F- < H2O < I- < CN- < CO


110.

Arrange the following species in the correct order of their stability

C2, Li2, O2+, He2+

  • Li2 < He2+ < O2+ < C2

  • C2 < O2+ < Li2 < He2+

  • He2+ < Li2 < C2 < O2+

  • O2+ < C2 < Li2 < He2+


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