NEET Chemical Bonding and Molecular Structure PYQ practice sheet

18 previous-year NEET Chemistry questions from Chemical Bonding and Molecular Structure, newest papers first. Chemical Bonding and Molecular Structure carries 19 of the Chemistry questions in NEET 2020 to 2026, so this is a good place to test yourself after revising the chapter. Marking: +4 correct, −1 wrong.

1. 1.

   RE-NEET 2026

   Match the species in List-I with their geometry in List-II. List-I: A. $\mathrm{PCl_5}$ B. $\mathrm{BrF_5}$ C. $\mathrm{BF_4^-}$ D. $[\mathrm{Ni(CN)_4}]^{2-}$ List-II: I. Tetrahedral II. Square Planar III. Trigonal bipyramidal IV. Square pyramidal Choose the correct answer from the options given below:

   • (A)
     A-IV, B-III, C-I, D-II
   • (B)
     A-III, B-II, C-I, D-IV
   • (C)
     A-III, B-IV, C-I, D-II
   • (D)
     A-III, B-I, C-II, D-IV
2. 2.

   RE-NEET 2026

   Arrange the following compounds in the increasing order of polarity A. $\mathrm{CH_3CH_2OCH_2CH_3}$ B. $\mathrm{CH_3CH_2OH}$ C. $\mathrm{CH_3COCH_3}$ D. $\mathrm{CH_3COOH}$ Choose the correct answer from the options given below.

   • (A)
     A < B < C < D
   • (B)
     A < C < B < D
   • (C)
     C < A < B < D
   • (D)
     C < A < D < B
3. 3.

   RE-NEET 2026

   The highest occupied molecular orbital for $\mathrm{Ne_2}$ is

   • (A)
     $\sigma^*_{2p}$
   • (B)
     $\pi^*_{2p}$
   • (C)
     $\pi_{2p}$
   • (D)
     $\sigma_{2p}$
4. 4.

   NEET 2026

   Match List I with List II: List I: A. $\mathrm{C_2H_4}$, B. $\mathrm{C_2H_2}$, C. $\mathrm{CH_4}$, D. $\mathrm{NH_3}$ List II: I. 3 $\sigma$ bonds, 2 $\pi$ bonds, II. 3 $\sigma$ bonds, one lone pair, III. 4 $\sigma$ bonds, IV. 5 $\sigma$ bonds, 1 $\pi$ bond Choose the correct answer from the options given below:

   • (A)
     A-III, B-IV, C-II, D-I
   • (B)
     A-II, B-III, C-I, D-IV
   • (C)
     A-IV, B-I, C-III, D-II
   • (D)
     A-I, B-II, C-IV, D-III
5. 5.

   NEET 2026

   Identify the correct statement about $\mathrm{ClF_3}$ from the following options:

   • (A)
     It has a planar trigonal geometry with two lone pairs on Cl atom.
   • (B)
     It has T-shaped geometry with three lone pairs on Cl atom.
   • (C)
     It has a trigonal pyramidal geometry with two lone pairs on Cl atom.
   • (D)
     It has T-shaped geometry with two lone pairs on Cl atom.
6. 6.

   NEET 2026

   The correct formal charges on oxygen atoms numbered 2, 1 and 3 respectively are: The structure is ozone. Oxygen 1 is the central atom: it has one lone pair, a double bond to oxygen 2 and a single bond to oxygen 3. Oxygen 2 has two lone pairs and oxygen 3 has three lone pairs.

   • (A)
     +1, 0, –1
   • (B)
     0, +1, –1
   • (C)
     0, 0, 0
   • (D)
     –1, 0, +1
7. 7.

   NEET 2024

   Intramolecular hydrogen bonding is present in

   • (A)
     
   • (B)
     
   • (C)
     
   • (D)
     
8. 8.

   NEET 2024

   Match List-I with List-II. List-I (Compound): (A) $\mathrm{NH_3}$, (B) $\mathrm{BrF_5}$, (C) $\mathrm{XeF_4}$, (D) $\mathrm{SF_6}$ List-II (Shape/geometry): (I) Trigonal pyramidal, (II) Square planar, (III) Octahedral, (IV) Square pyramidal Choose the correct answer from the options given below:

   • (A)
     A-III, B-IV, C-I, D-II
   • (B)
     A-I, B-IV, C-II, D-III
   • (C)
     A-II, B-III, C-IV, D-I
   • (D)
     A-II, B-IV, C-III, D-I
9. 9.

   NEET 2024

   Match List I with List II. List-I (Molecule): (A) ethane, (B) ethene, (C) carbon molecule, $\mathrm{C_2}$, (D) ethyne List-II (Number and types of bond/s between two carbon atoms): (I) one $\sigma$-bond and two $\pi$-bonds, (II) two $\pi$-bonds, (III) one $\sigma$-bond, (IV) one $\sigma$-bond and one $\pi$-bond Choose the correct answer from the options given below:

   • (A)
     A-I, B-IV, C-II, D-III
   • (B)
     A-III, B-IV, C-I, D-II
   • (C)
     A-IV, B-III, C-II, D-I
   • (D)
     A-III, B-IV, C-II, D-I
10. 10.

    NEET 2023

    Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is $\mathrm{NH_3,\ AlCl_3,\ BeCl_2,\ CCl_4,\ PCl_5}$ :

    • (A)
      1
    • (B)
      3
    • (C)
      2
    • (D)
      4
11. 11.

    NEET 2023

    The correct order of energies of molecular orbitals of $\mathrm{N_2}$ molecule, is :

    • (A)
      $\sigma1s<\sigma^*1s<\sigma2s<\sigma^*2s<(\pi2p_x=\pi2p_y)<(\pi^*2p_x=\pi^*2p_y)<\sigma2p_z<\sigma^*2p_z$
    • (B)
      $\sigma1s<\sigma^*1s<\sigma2s<\sigma^*2s<(\pi2p_x=\pi2p_y)<\sigma2p_z<(\pi^*2p_x=\pi^*2p_y)<\sigma^*2p_z$
    • (C)
      $\sigma1s<\sigma^*1s<\sigma2s<\sigma^*2s<\sigma2p_z<(\pi2p_x=\pi2p_y)<(\pi^*2p_x=\pi^*2p_y)<\sigma^*2p_z$
    • (D)
      $\sigma1s<\sigma^*1s<\sigma2s<\sigma^*2s<\sigma2p_z<\sigma^*2p_z<(\pi2p_x=\pi2p_y)<(\pi^*2p_x=\pi^*2p_y)$
12. 12.

    NEET 2022

    Which amongst the following is incorrect statement?

    • (A)
      $\mathrm{O_2^+}$ ion is diamagnetic.
    • (B)
      The bond orders of $\mathrm{O_2^+, O_2, O_2^-}$ and $\mathrm{O_2^{2-}}$ are 2.5, 2, 1.5 and 1, respectively.
    • (C)
      $\mathrm{C_2}$ molecule has four electrons in its two degenerate $\pi$ molecular orbitals.
    • (D)
      $\mathrm{H_2^+}$ ion has one electron.
13. 13.

    NEET 2022

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

    • (A)
      $\mathrm{XeF_2}$
    • (B)
      $\mathrm{ClF_3}$
    • (C)
      $\mathrm{IF_5}$
    • (D)
      $\mathrm{SF_4}$
14. 14.

    NEET 2021

    $\mathrm{BF_3}$ is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :

    • (A)
      $sp^{2}$ and 8
    • (B)
      $sp^{3}$ and 6
    • (C)
      $sp^{3}$ and 4
    • (D)
      $sp^{2}$ and 6
15. 15.

    NEET 2021

    Choose the correct answer from the options given below.

    • (A)
      (a)-(iv), (b)-(iii), (c)-(i), (d)-(ii)
    • (B)
      (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
    • (C)
      (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
    • (D)
      (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
16. 16.

    NEET 2021

    Which of the following molecules is non-polar in nature ?

    • (A)
      $\mathrm{CH_2O}$
    • (B)
      $\mathrm{POCl_3}$
    • (C)
      $\mathrm{NO_2}$
    • (D)
      $\mathrm{SbCl_5}$
17. 17.

    NEET 2020

    Identify a molecule which does not exist.

    • (A)
      $\mathrm{He_2}$
    • (B)
      $\mathrm{Li_2}$
    • (C)
      $\mathrm{C_2}$
    • (D)
      $\mathrm{O_2}$
18. 18.

    NEET 2020

    Which of the following set of molecules will have zero dipole moment?

    • (A)
      Ammonia, beryllium difluoride, water, 1,4-dichlorobenzene
    • (B)
      Boron trifluoride, hydrogen fluoride, carbon dioxide, 1,3-dichlorobenzene
    • (C)
      Nitrogen trifluoride, beryllium difluoride, water, 1,3-dichlorobenzene
    • (D)
      Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene