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Chemical Bonding and Molecular Structure

JEE Mains Chemistry. Try each one first, then open its answer.

Top 10 JEE Mains PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 15 times: 2021 Paper 11, 2021 Paper 12, 2021 Paper 13, 14 Jun 2022, 28 Jun 2022, 25 Jul 2022, 29 Jul 2022, 31 Jan 2024, 4 Apr 2024, 6 Apr 2024, 9 Apr 2024, 3 Apr 2025, 7 Apr 2025, 24 Jan 2026 S1, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 15 of this type

    46
    Consider the following species BrF5,XeF5−,BF4−,ICl4−,XeF4,SF4,NH4+,ClF3,XeF2,ICl2−{BrF}_{5},{XeF}_{5}^{-},{BF}_{4}^{-},{ICl}_{4}^{-},{XeF}_{4},{SF}_{4},{NH}_{4}^{+},{ClF}_{3},{XeF}_{2},{ICl}_{2}^{-}Number of species having sp  3 d\ ^{3}\text{ }d hybridized central atom is ____\_\_\_\_

  2. Question 2

    This type asked 13 times: 2021 Paper 2, 2021 Paper 7, 2021 Paper 8, 27 Jun 2022, 26 Jul 2022, 31 Jan 2023, 11 Apr 2023, 30 Jan 2024, 6 Apr 2024, 8 Apr 2024, 28 Jan 2025, 28 Jan 2026 S2, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 13 of this type

    28
    Bromine trifluoride autoionizes to form BrF2⊕BrF_{2}^{\oplus} and BrF4⊖BrF_{4}^{\ominus}. The shapes of the cation and anion are respectively ____\_\_\_\_ , and ____\_\_\_\_ .

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  3. Question 3

    This type asked 10 times: 2021 Paper 11, 2021 Paper 20, 26 Jun 2022, 29 Jun 2022, 25 Jul 2022, 30 Jan 2023, 8 Apr 2023, 11 Apr 2023, 29 Jan 2024, 7 Apr 2025. This one: 7 Apr 2025 See all 10 of this type

    41
    Match the LIST-I with LIST-II.
    LIST-I (Molecule/ion)LIST-II (Bond pairs : lone pairs on the central atom)
    A.
    ICl2−{ICl}_{2}^{-}
    		I.4:2
    B.
    H2OH_{2}O
    		II.4:1
    C.
    SO2{SO}_{2}
    		III.2 : 3
    D.
    XeF4{XeF}_{4}
    		IV.2 : 2
    Choose the correct answer from the options given below:

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  4. Question 4

    This type asked 9 times: 2021 Paper 23, 2021 Paper 24, 25 Jul 2022, 28 Jul 2022, 29 Jan 2024, 4 Apr 2024, 9 Apr 2024, 28 Jan 2025, 4 Apr 2025. This one: 4 Apr 2025 See all 9 of this type

    28
    Which of the following molecule(s) show/s paramagnetic behaviour? (A) O2O_{2} (B) N2N_{2} (C) F2F_{2} (D) S2S_{2} (E) Cl2Cl_{2} Choose the correct answer from the options given below :

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  5. Question 5

    This type asked 9 times: 2021 Paper 15, 2021 Paper 16, 2021 Paper 26, 14 Jun 2022, 26 Jun 2022, 27 Jul 2022, 29 Jan 2023, 27 Jan 2024, 8 Apr 2024. This one: 8 Apr 2024 See all 9 of this type

    142
    Number of molecules having bond order 2 from the following molecule is _______ .
    C2,O2,Be2,Li2,Ne2, N2,He2C_{2},O_{2},Be_{2},Li_{2},Ne_{2},{\text{ }N}_{2},He_{2}

  6. Question 6

    This type asked 8 times: 2021 Paper 21, 27 Jul 2022, 31 Jan 2023, 6 Apr 2023, 10 Apr 2023, 1 Feb 2024, 4 Apr 2024, 22 Jan 2025. This one: 22 Jan 2025 See all 8 of this type

    48
    The number of molecules/ions that show linear geometry among the following is _____\_\_\_\_\_ .
    SO2,BeCl2,CO2, N3−,NO2, F2O,XeF2,NO2+,I3−,O3SO_{2},BeCl_{2},CO_{2},{\text{ }N}_{3}^{-},NO_{2},{\text{ }F}_{2}O,XeF_{2},NO_{2}^{+},I_{3}^{-},O_{3}

  7. Question 7

    This type asked 6 times: 25 Jun 2022, 29 Jul 2022, 29 Jan 2023, 8 Apr 2024, 23 Jan 2025, 6 Apr 2026 S2. This one: 6 Apr 2026 S2 See all 6 of this type

    28
    Given below are two statements: Statement I: The number of compounds among SO2,SO3,SF4,SF6{SO}_{2},{SO}_{3},{SF}_{4},{SF}_{6} and H2 SH_{2}\text{ }S in which sulphur does not obey the Octet rule is 3 . Statement II : Among [H2O,ClF3,SF4],[NH3\left\lbrack H_{2}O,{ClF}_{3},{SF}_{4} \right\rbrack,\left\lbrack {NH}_{3} \right.,  BrF5,SF4], [BrF5, ClF3, XeF4]\left. \ {BrF}_{5},{SF}_{4} \right\rbrack,\ \left\lbrack {BrF}_{5},\ {ClF}_{3},\ {XeF}_{4} \right\rbrack and  [XeF4\ \left\lbrack {XeF}_{4} \right.,  ClF3,H2O]\left. \ {ClF}_{3},H_{2}O \right\rbrack, the number of sets in which all the molecules have one lone pair of electrons on the central atom is 1 . In the light of the above statements, choose the correct answer from the options given below :

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  8. Question 8

    This type asked 6 times: 2021 Paper 19, 25 Jun 2022, 12 Apr 2023, 13 Apr 2023, 24 Jan 2026 S2, 2 Apr 2026 S1. This one: 2 Apr 2026 S1 See all 6 of this type

    28
    Given below are two statements : Statement (I) : The correct sequence of bond lengths in the following species is :
    O2+<O2<O2−<O22−O_{2}^{+} < O_{2} < O_{2}^{-} < O_{2}^{2 -}
    Statement (II) : The correct sequence of number of unpaired electrons in the following species is :
    O2>O2+>O2−>O22−O_{2} > O_{2}^{+} > O_{2}^{-} > O_{2}^{2 -}
    In the light of the above statements, choose the correct answer from the options given below :

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  9. Question 9

    This type asked 5 times: 25 Jan 2023, 10 Apr 2023, 5 Apr 2024, 29 Jan 2025, 4 Apr 2026 S1. This one: 4 Apr 2026 S1 See all 5 of this type

    46
    According to Lewis theory, the total number of σ\sigma bond-pairs and lone pair of electrons around the central atom of XeO64−{XeO}_{6}^{4 -} ion is ____\_\_\_\_ .

  10. Question 10

    This type asked 5 times: 10 Apr 2023, 13 Apr 2023, 4 Apr 2024, 22 Jan 2025, 22 Jan 2026 S2. This one: 22 Jan 2026 S2 See all 5 of this type

    36
    Among H2 S,H2O,NF3,NH3H_{2}\text{ }S,H_{2}O,NF_{3},NH_{3} and CHCl3CHCl_{3}, identify the molecule (X)(X) with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the molecule (X)(X) is :

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