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Chemical Bonding and Molecular Structure · Question 102

AIPMT 2001MCQEasy📈 Topic in 62% papers+4−1
1

Main axis of a diatomic molecule is z, atomic orbitals px and py overlap to form which of the following orbitals.

  1. molecular orbital
  2. molecular orbital
  3. molecular orbital
  4. No bond will form

Answer

(1) molecular orbital

Solution

∵ The internuclear (molecular) axis is the z-axis.

⇒ pz orbitals overlap head-on (along the axis) and form molecular orbitals.

⇒ px and py orbitals are perpendicular to the axis, so they overlap sideways (lateral overlap): px with px and py with py.

As per NCERT, sideways overlap of p orbitals gives (bonding) and * (antibonding) molecular orbitals.

∴ px and py form molecular orbitals.

Answer: (1)

AIPMT 2001

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2

Which of the following two are isostructural?

  1. XeF2, IF2-
  2. NH3, BF3
  3. CO32-, SO32-
  4. PCl5, ICl5
AIPMT 2001
3

In which of the following bond angle is maximum ?

  1. NH3
  2. NH4+
  3. PCl3
  4. SCl2
AIPMT 2001
4

In X-H Y, X and Y both are electronegative elements. Then

  1. electron density on X will increase and on H will decrease
  2. in both electron density will increase
  3. in both electron density will decrease
  4. on X electron density will decrease and on H will increase.
AIPMT 2001
5

d - p bond present in

  1. CO32-
  2. PO43-
  3. NO3-
  4. NO2-
AIPMT 2000
6

Right order of dissociation energy N2 and N2+ is

  1. N2 > N2+
  2. N2 = N2+
  3. N2+ > N2
  4. none
AIPMT 2000
7

Which species does not exhibit paramagnetism?

  1. N2+
  2. O2-
  3. CO
  4. NO
AIPMT 2000
8

Which compound forms linear polymer due to H-bond?

  1. H2O
  2. NH3
  3. HF
  4. HCl
Out of syllabusAIPMT 2000

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