Important Questions of Chemical Bonding and Molecular Structure Chemistry | Zigya

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191.

Fluorine reacts with dilute NaOH and forms a gaseous product A. The bond angle in the molecule of A is

  • 104°40'

  • 103°

  • 107°

  • 109°28'


192.

The number of pπ-dπ 'pi' bonds present in XeO3 and XeO4 molecules, respectively are-

  • 3, 4

  • 4, 2

  • 2, 3

  • 3, 2


193.

Which one of the following sets correctly represents the increase in the paramagnetic property of the ions?

  • Cu2+ > V2+ > Cr2+ > Mn2+

  • Cu2+ < Cr2+ < V2+ < Mn2+

  • Cu2+ < V2+ < Cr2+ < Mn2+

  • V2+ < Cu2+ < Cr2+ < Mn2+


194.

Dipole moment of HCl = 1.03 D, HI= 0.38 D. Bond length of HCl = 1.3 Å and HI = 1.6 Å. The ratio of fraction of electric charge, δ, existing on each atom in HCl and HI is

  • 12 : 1

  • 2.7 : 1

  • 3.3 : 1

  • 1 : 3.3


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195.

Match the following
  Column I (molecules)   Column II ( number of lone pair on central atom)
A NH3 1 Three
B H2O 2 Two
C XeF2 3 Zero
D CH4 4 Four
    5 One

  • A B C D

    5 1 3 2

  • A B C D

    3 1 2 5

  • A B C D

    5 1 2 3

  • A B C D

    1 5 3 4


196.

Identify the order in which the spin only magnetic moment (in BM) increases for the following four ions

(I) Fe2+

(II) Ti2+

(III) Cu2+

(IV) V2+

  • I, II, IV, III

  • IV, I, II, III

  • III, IV, I, II

  • III, II, IV, I


197.

The formal charges of N(1), N(2) and O atoms in the following figure are respectively

  • +1, -1, 0

  • -1, +1, 0

  • +1, +1, 0

  • -1, -1, 0


198.

In which of the following pairs, the central atoms have the same number of lone pairs of electrons?

  • PCl5, BrF5

  • XeF2, ICl

  • XeF4, ClO4-

  • SCl4, CH4


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199.

Identify the correct set.

  • Molecule Hybridisation of central atom Shape
    PCl5 dsp3 square pyramidal
  • [Ni(CN)4]2- sp3 tetrahedral
  • SF6 sp3d2 octahedral
  • IF3 dsp3 pyramidal

200.

Which one of the following statements is correct?

  • Hybrid orbitals do not form σ bonds.

  • Lateral overlap of p-orbitals or p- and d-orbitals produces π-bonds.

  • The strength of bonds follows the order-

    σp-p < σs-sπp-p

  • s-orbitals do not form σ bonds.


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