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Day 68: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. This type asked 3 times: 29 Jan 2023, 31 Jan 2024, 1 Feb 2024. This one: 1 Feb 2024 See all 3 of this type

    148
    For a certain reaction at 300 K, K=10300\text{ }K,\text{ }K = 10, then ΔG∘\Delta G^{\circ} for the same reaction is - _______ ×10−1 kJ mol−1\times10^{- 1}\text{ }kJ{\text{ }mol}^{- 1}. (Given R=8.314JK−1 mol−1R = 8.314JK^{- 1}{\text{ }mol}^{- 1} )

  2. Question 2

    Alcohols, Phenols and Ethers. This type asked 3 times: 29 Jun 2022, 29 Jan 2024, 31 Jan 2024. This one: 31 Jan 2024 See all 3 of this type

    44
    Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: pKapK_{a} value of phenol is 10.0 while that of ethanol is 15.9. Reason R: Ethanol is stronger acid than phenol. In the light of the above statements, choose the correct answer from the options given below:

    Tap an option to check your answer.

  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 3 times: 29 Jul 2022, 30 Jan 2024, 31 Jan 2024. This one: 31 Jan 2024 See all 3 of this type

    127
    Identify structure of 2,3-dibromo-1-phenylpentane

    Tap an option to check your answer.

  4. Question 4

    Some Basic Concepts of Chemistry. This type asked 3 times: 26 Jul 2022, 27 Jul 2022, 31 Jan 2024. This one: 31 Jan 2024 See all 3 of this type

    145
    Number of moles of H+H^{+}ions required by 1 mole of MnO4−MnO_{4}^{-}to oxidise oxalate ion to CO2CO_{2} is _____ .

  5. Question 5

    Structure of Atom. This type asked 3 times: 14 Jun 2022, 30 Jan 2023, 31 Jan 2024. This one: 31 Jan 2024 See all 3 of this type

    59
    If electromagnetic radiation of wavelength 242 nm242\text{ }nm is just sufficient to ionize a sodium atom, the ionization energy of sodium in kJ mol−1\mathrm{kJ\ mol^{-1}} is _____.