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Day 157: JEE Mains Chemistry

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

  1. Question 1

    Equilibrium. Asked once: 26 Jun 2022 (same type asked 3 times) See all 3 of this type

    146
    40%40\% of HIHI undergoes decomposition to H2H_{2} and I2I_{2} at 300 K.ΔG⊖300\text{ }K.\Delta G^{\ominus} for this decompostion reaction at one atmosphere pressure is ____\_\_\_\_ Jmol−1Jmol^{- 1}. [nearest integer] (Use R=8.31 J K−1 mol−1;log⁡2=0.3010, ln⁡10=2.3, log⁡3=0.477R = 8.31\text{ }J{\text{ }K}^{- 1}{\text{ }mol}^{- 1};\log2 = 0.3010,\ \ln10 = 2.3,\ \log3 = 0.477 )

  2. Question 2

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 31 Jan 2024 (same type asked 3 times) See all 3 of this type

    135
    The fragrance of flowers is due to the presence of some steam volatile organic compounds called essential oils. These are generally insoluble in water at room temperature but are miscible with water vapour in vapour phase. A suitable method for the extraction of these oils from the flowers is

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  3. Question 3

    Amines. Asked once: 2021 Paper 15 (same type asked 3 times) See all 3 of this type

    40
    Y + aniline reacts to give yellow dye. Find structure of yellow dye Identify Z

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  4. Question 4

    Chemical Thermodynamics. Asked once: 21 Jan 2026 S1 (same type asked 3 times) See all 3 of this type

    43
    Which of the following graphs between pressure 'P' versus volume 'V' represent the maximum work done?

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  5. Question 5

    Coordination Compounds. Asked once: 5 Apr 2026 S2 (same type asked 3 times) See all 3 of this type

    35
    Given below are two statements : Statement-I : Presence of large number of unpaired electrons in transition metal atoms results in higher enthalpies of their atomization. Statement-II : dxy=dxz=dyz<dx2−y2=dz2d_{xy} = d_{xz} = d_{yz} < d_{x^{2} - y^{2}} = d_{z^{2}} and dx2−y2=dz2<dxy=dxz=dyzd_{x^{2} - y^{2}} = d_{z^{2}} < d_{xy} = d_{xz} = d_{yz} are the d-orbital splitting in [Fe(H2O)6]3+\left\lbrack Fe\left( H_{2}O \right)_{6} \right\rbrack^{3 +} and [Ni(Cl)4]2−\left\lbrack Ni(Cl)_{4} \right\rbrack^{2 -} complex ions respectively. In the light of the above statements, choose the correct answer from the options given below:

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