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Day 2: JEE Mains Chemistry

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

  1. Question 1

    Coordination Compounds. This type asked 12 times: 2021 Paper 3, 2021 Paper 17, 24 Jan 2023, 30 Jan 2023, 27 Jan 2024, 1 Feb 2024, 9 Apr 2024, 28 Jan 2025, 29 Jan 2025, 2 Apr 2025, 23 Jan 2026 S2, 24 Jan 2026 S1. This one: 24 Jan 2026 S1 See all 12 of this type

    26
    Given below are two statements : Statement-I Hybridisation, shape and spin only magnetic moment of K3[Co(CO3)3]K_{3}\left\lbrack Co\left( {CO}_{3} \right)_{3} \right\rbrack is sp3 d2{sp}^{3}{\text{ }d}^{2}, octahedral and 4.9 BM respectively. Statement-II Geometry, hybridisation and spin only magnetic moment values (BM) of the ions [Ni(CN)4]2−,[MnBr4]2−\left\lbrack Ni(CN)_{4} \right\rbrack^{2 -},\left\lbrack {MnBr}_{4} \right\rbrack^{2 -} and [CoF6]3−\left\lbrack {CoF}_{6} \right\rbrack^{3 -} respectively are square planar, tetrahedral, octahedral : dsp2,sp3{dsp}^{2},{sp}^{3}, sp3 d2{sp}^{3}{\text{ }d}^{2} and 0, 5.9, 4.9. In the light of the above statements, choose the correct answer from the options given below

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  2. Question 2

    Hydrocarbons. This type asked 11 times: 2021 Paper 2, 2021 Paper 5, 2021 Paper 7, 2021 Paper 19, 28 Jun 2022, 26 Jul 2022, 27 Jul 2022, 27 Jan 2024, 8 Apr 2024, 2 Apr 2025, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 11 of this type

    39
    The total number of aromatic compounds/species from the following is:

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  3. Question 3

    Some Basic Concepts of Chemistry. This type asked 11 times: 25 Jun 2022, 27 Jul 2022, 28 Jul 2022, 25 Jan 2023, 29 Jan 2023, 6 Apr 2023, 13 Apr 2023, 29 Jan 2024, 22 Jan 2025, 3 Apr 2025, 23 Jan 2026 S1. This one: 23 Jan 2026 S1 See all 11 of this type

    48
    x mg of pure HCl was used to make an aqueous solution. 25.0 mL of 0.1MBa(OH)20.1MBa(OH)_{2} solution is used when the HCl solution was titrated against it. The numerical value of xx is ____\_\_\_\_ ×10−1\times 10^{- 1}. (Nearest integer) Given : Molar mass of HCl and Ba(OH)2Ba(OH)_{2} are 36.5 and 171.0 g mol−1171.0\text{ }g{\text{ }mol}^{- 1} respectively.

  4. Question 4

    Coordination Compounds. This type asked 10 times: 2021 Paper 14, 28 Jun 2022, 26 Jul 2022, 25 Jan 2023, 8 Apr 2023, 10 Apr 2023, 3 Apr 2025, 7 Apr 2025, 24 Jan 2026 S1, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 10 of this type

    46
    Number of paramagnetic complexes among the following is ____\_\_\_\_ . [MnBr4]2−\left\lbrack {MnBr}_{4} \right\rbrack^{2 -}, [NiCl4]2−\left\lbrack {NiCl}_{4} \right\rbrack^{2 -}, [Ni(CN)4]2−\left\lbrack Ni(CN)_{4} \right\rbrack^{2 -}, [Ni(CO)4]\left\lbrack Ni(CO)_{4} \right\rbrack, [CoF6]3−\left\lbrack {CoF}_{6} \right\rbrack^{3 -}, [Fe(CN)6]4−, [Mn(CN)6]3−, [Ti(CN)6]3−\lbrack Fe(CN)_{6}\rbrack^{4 -},\ \left\lbrack Mn(CN)_{6} \right\rbrack^{3 -},\ \left\lbrack Ti(CN)_{6} \right\rbrack^{3 -}, [Cu(H2O)6]2+,[Co(C2O4)3]3−\left\lbrack Cu\left( H_{2}O \right)_{6} \right\rbrack^{2 +},\left\lbrack Co\left( C_{2}O_{4} \right)_{3} \right\rbrack^{3 -}

  5. Question 5

    Some Basic Concepts of Chemistry. This type asked 10 times: 2021 Paper 24, 25 Jun 2022, 26 Jul 2022, 10 Apr 2023, 30 Jan 2024, 3 Apr 2025, 4 Apr 2026 S1, 4 Apr 2026 S2, 6 Apr 2026 S2, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 10 of this type

    26
    Match List-I with List-II.
    List-I Mass of substanceList-II Number of atoms
    (A)1.8mg1.8mg water(I)
    2×10−4×NA2 \times 10^{- 4} \times N_{A}
    (B)9.8mg9.8mg sulphuric acid(II)
    1.5×10−4×NA1.5 \times 10^{- 4} \times N_{A}
    (C)1.8 mg carbon(III)
    3×10−4×NA3 \times 10^{- 4} \times N_{A}
    (D)5.85 mg salt (NaCl)(NaCl)(IV)
    7×10−4×NA7 \times 10^{- 4} \times N_{A}
    Choose the correct answer from the options given below:

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