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Chemical Bonding and Molecular Structure · Question 38

NEET 2016 (Phase 2)MCQMedium📈 Topic in 12% papers+4−1
1

The correct geometry and hybridization for XeF4 are

  1. octahedral, sp3d2
  2. trigonal bipyramidal, sp3d
  3. planar triangle, sp3d3
  4. square planar, sp3d2

Answer

(1) octahedral, sp3d2

Solution

Xe has 8 valence electrons; 4 are used in four Xe–F bonds ⇒ 4 bond pairs + 2 lone pairs = 6 electron pairs.

Number of hybrid orbitals = 12(8+4)=6 ⇒ hybridisation sp3d2.

⇒ The six electron pairs (hybrid orbitals) are arranged octahedrally ⇒ geometry: octahedral.

∵ The two lone pairs occupy positions trans to each other, the shape of the molecule (positions of atoms only) is square planar.

∴ Geometry octahedral, hybridisation sp3d2.

Answer: (1)

NEET 2016 (Phase 2)

Keep practising — Chemical Bonding and Molecular Structure

2

Among the following, which one is a wrong statement ?

  1. PH5 and BiCl5 do not exist.
  2. p -d bonds are present in SO2.
  3. SeF4 and CH4 have same shape.
  4. I3+ has bent geometry.
NEET 2016 (Phase 2)
3

In which of the following pairs, both the species are not isostructural ?

  1. Diamond, Silicon carbide
  2. NH3, PH3
  3. XeF4, XeO4
  4. SiCl4, PCl4+
AIPMT 2015
4

Decreasing order of stability of O2, O2-, O2+ and O22- is

  1. O22- > O2- > O2 > O2+
  2. O2 > O2+ > O22- > O2-
  3. O2- > O22- > O2+ > O2
  4. O2+ > O2 > O2- > O22-
AIPMT 2015
5

Which of the following pairs of ions are isoelectronic and isostructural ?

  1. SO32-, NO3-
  2. ClO3-, SO32-
  3. CO32-, SO32-
  4. ClO3-, CO32-
AIPMT 2015 (Cancelled)
6

The correct bond order in the following species is

  1. O2+ < O2- < O22+
  2. O2- < O2+ < O22+
  3. O22+ < O2+ < O2-
  4. O22+ < O2- < O2+
AIPMT 2015 (Cancelled)
7

Which of the following options represents the correct bond order ?

  1. O2- > O2 < O2+
  2. O2- < O2 > O2+
  3. O2- > O2 > O2+
  4. O2- < O2 < O2+
AIPMT 2015 (Cancelled)
8

Maximum bond angle at nitrogen is present in which of the following ?

  1. NO2+
  2. NO3-
  3. NO2
  4. NO2-
AIPMT 2015 (Cancelled)
9

Which of the following species contains equal number of σ- and π-bonds ?

  1. (CN)2
  2. CH2(CN)2
  3. HCO3-
  4. XeO4
AIPMT 2015 (Cancelled)
10

Which of the following molecules has the maximum dipole moment?

  1. CO2
  2. CH4
  3. NH3
  4. NF3
AIPMT 2014
11

Which one of the following species has plane triangular shape?

  1. N3-
  2. NO3-
  3. NO2-
  4. CO2
AIPMT 2014

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