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Chemical Bonding and Molecular Structure · Question 8

NEET (UG) 2025MCQMedium📈 Topic in 25% papers+4−1
1

Identify the correct orders against the property mentioned Choose the correct answer from the options given below:

  1. A, C only
  2. B, C only
  3. A, D only
  4. B, D only

Answer

(3) A, D only

Solution

A. Dipole moment (NCERT): H2O (1.85 D) > NH3 (1.47 D) > CHCl3 (1.04 D) → correct.

B. Lone pairs on Xe: XeF2 = 3, XeF4 = 2, XeO3 = 1 ⇒ XeF2 > XeF4 > XeO3 → given order incorrect.

C. Bond length (NCERT): N–O (136 pm) > C–H (107 pm) > O–H (96 pm) ⇒ given order is reversed → incorrect.

D. Bond enthalpy ( kJ mol-1): N2 (946) > O2 (498) > H2 (435.8) → correct.

∴ A and D only.

Answer: (3)

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2

Match List I with List II. Choose the correct answer from the options given below :

  1. A-I, B-IV, C-II, D-III
  2. A-IV, B-III, C-II, D-I
  3. A-III, B-IV, C-II, D-I
  4. A-III, B-IV, C-I, D-II
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3

Intramolecular hydrogen bonding is present in

  1. [figure]
  2. [figure]
  3. [figure]
  4. HF
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4

Match List I with List II. Choose the correct answer from the options given below:

  1. A-I, B-IV, C-II, D-III
  2. A-II, B-IV, C-III, D-I
  3. A-III, B-IV, C-I, D-II
  4. A-II, B-III, C-IV, D-I
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5

Identify the correct answer.

  1. Three resonance structures can be drawn for ozone
  2. BF3 has non-zero dipole moment
  3. Dipole moment of NF3 is greater than that of NH3
  4. Three canonical forms can be drawn for CO32- ion
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6

Which of the following molecules has "NON ZERO" dipole moment value?

  1. CCl4
  2. HI
  3. CO2
  4. BF3
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7

Identify the incorrect statement about PCl5.

  1. PCl5 possesses two different Cl-P-Cl bond angles
  2. All five P-Cl bonds are identical in length
  3. PCl5 exhibits sp3d hybridisation
  4. PCl5 consists of five P-Cl (sigma) bonds
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8

Match List-I with List-II: Choose the correct answer from the options given below:

  1. A-III, B-IV, C-I, D-II
  2. A-IV, B-I, C-III, D-II
  3. A-IV, B-III, C-II, D-I
  4. A-IV, B-III, C-I, D-II
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9

Amongst the following, the total number of species NOT having eight electrons around central atom in its outermost shell, is NH3, AlCl3, BeCl2, CCl4, PCl5

  1. 2
  2. 4
  3. 1
  4. 3
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10

The correct order of energies of molecular orbitals of N2 molecule, is

  1. 1s < 1s < 2s < 2s < 2pz < ( 2px = 2py) < ( 2px = 2py) < 2pz
  2. 1s < 1s < 2s < 2s < 2pz < 2pz < ( 2px = 2py) < ( 2px = 2py)
  3. 1s < 1s < 2s < 2s < ( 2px = 2py) < ( 2px = 2py) < 2pz < 2pz
  4. 1s < 1s < 2s < 2s < ( 2px = 2py) < 2pz < ( 2px = 2py) < 2pz
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11

Amongst the following which one will have maximum 'lone pair - lone pair' electron repulsions?

  1. ClF3
  2. IF5
  3. SF4
  4. XeF2
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