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Day 5: JEE Mains Chemistry

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

  1. Question 1

    Chemical Bonding and Molecular Structure. 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}

  2. Question 2

    Some Basic Concepts of Chemistry. This type asked 9 times: 2021 Paper 13, 2021 Paper 19, 2021 Paper 22, 2021 Paper 23, 2021 Paper 24, 2021 Paper 26, 27 Jan 2024, 30 Jan 2024, 4 Apr 2024. This one: 4 Apr 2024 See all 9 of this type

    48
    The Molarity (M) of an aqueous solution containing 5.85 g5.85\text{ }g of NaClNaCl in 500 mL500\text{ }mL water is: (Given: Molar Mass Na:23Na:23 and Cl:35.5 g mol−1Cl:35.5\text{ }g\text{ }mol^{- 1} )

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  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 8 times: 2021 Paper 9, 25 Jan 2023, 5 Apr 2024, 6 Apr 2024, 28 Jan 2025, 21 Jan 2026 S1, 21 Jan 2026 S2, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 8 of this type

    39
    Given below are two statements : Statement-I : 2, 6-diethylcyclohexanone and 6-methyl-2-n-propylcyclohexanone are metamers. Statement-II : 2, 2, 6, 6-tetramethylcyclohexanone exhibits keto-enol tautomerism. In the light of the above statements, choose the correct answer from the options given below.

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  4. Question 4

    Structure of Atom. This type asked 8 times: 24 Jan 2023, 29 Jan 2023, 31 Jan 2023, 21 Jan 2026 S2, 22 Jan 2026 S2, 24 Jan 2026 S1, 4 Apr 2026 S1, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 8 of this type

    27
    If shortest wavelength of hydrogen atom in Lyman series is x , then longest wavelength in Balmer series of He+He^{+}is :

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  5. Question 5

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 8 times: 2021 Paper 19, 25 Jan 2023, 23 Jan 2025, 29 Jan 2025, 21 Jan 2026 S1, 28 Jan 2026 S2, 4 Apr 2026 S2, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 8 of this type

    47
    In an estimation of sulphur by Carius method 0.2 g of the substance gave 0.6 g of BaSO4{BaSO}_{4}. The percentage of sulphur in the substance is ____\_\_\_\_ %. (Given molar mass in gmol−1 S:32,BaSO4:231g{mol}^{- 1}\text{ }S:32,{BaSO}_{4}:231 )