PYQ Vault

Day 277: JEE Mains Chemistry

5 questions. Try each one first, then open its answer.

  1. Question 1

    Chemical Bonding and Molecular Structure. Asked once: 8 Apr 2024 (same type asked 13 times) See all 13 of this type

    37
    Match List I with List II
    List-I (Molecule)List-II (Shape)
    A
    NH3NH_{3}
    I.Square pyramid
    B.
    BrF5BrF_{5}
    II.Tetrahedral
    C.
    PCl5PCl_{5}
    IIITrigonal pyramidal
    D.
    CH4CH_{4}
    IVTrigonal bipyramidal
    Choose the correct answer from the option below:

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  2. Question 2

    Coordination Compounds. Asked once: 29 Jan 2025 (same type asked 12 times) See all 12 of this type

    33
    Match List-I with List-II.
    List-I (Complex)List-II (Hybridisation and magnetic character)
    (A) [MnBr4]2−[MnBr_{4}]^{2-}(I) d2sp3d^{2}sp^{3}, diamagnetic
    (B) [FeF6]3−[FeF_{6}]^{3-}(II) sp3d2sp^{3}d^{2}, paramagnetic
    (C) [Co(C2O4)3]3−[Co(C_{2}O_{4})_{3}]^{3-}(III) sp3sp^{3}, diamagnetic
    (D) [Ni(CO)4][Ni(CO)_{4}](IV) sp3sp^{3}, paramagnetic
    Choose the correct answer from the options given below :

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  3. Question 3

    Hydrocarbons. Asked once: 8 Apr 2024 (same type asked 11 times) See all 11 of this type

    43
    Which of the following are aromatic?

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  4. Question 4

    Some Basic Concepts of Chemistry. Asked once: 29 Jan 2024 (same type asked 11 times) See all 11 of this type

    145
    If 50 mL50\text{ }mL of 0.5M0.5M oxalic acid is required to neutralise 25 mL25\text{ }mL of NaOHNaOH solution, the amount of NaOHNaOH in 50 mL50\text{ }mL of given NaOHNaOH solution is____ g.
  5. Question 5

    Coordination Compounds. Asked once: 7 Apr 2025 (same type asked 10 times) See all 10 of this type

    50
    The number of paramagnetic complex among [FeF6]3−,[Fe(CN)6]3−,[Mn(CN)6]3−,[Co(C2O4)3]3−\left\lbrack {FeF}_{6} \right\rbrack^{3 -},\left\lbrack Fe(CN)_{6} \right\rbrack^{3 -},\left\lbrack Mn(CN)_{6} \right\rbrack^{3 -},\left\lbrack Co\left( C_{2}O_{4} \right)_{3} \right\rbrack^{3 -}, [MnCl6]3−\left\lbrack {MnCl}_{6} \right\rbrack^{3 -} and [CoF6]3−\left\lbrack {CoF}_{6} \right\rbrack^{3 -}, which involved d2sp3d^{2}{sp}^{3} hybridization is ____