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Day 224: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. Asked once: 9 Apr 2024 (same type asked 5 times) See all 5 of this type

    60
    Number of colourless lanthanoid ions among the following is______
    Eu3+,Lu3+,Nd3+,La3+,Sm3+Eu^{3 +},Lu^{3 +},Nd^{3 +},La^{3 +},Sm^{3 +}

  2. Question 2

    Alcohols, Phenols and Ethers. Asked once: 28 Jul 2022 (same type asked 5 times) See all 5 of this type

    134
    Compound II is heated with Conc. HI to give a hydroxy compound AA which is further heated with ZnZn dust to give compound BB. Identify AA and BB.

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  3. Question 3

    Chemical Kinetics. Asked once: 29 Jun 2022 (same type asked 5 times) See all 5 of this type

    145
    The equation
    k=(6.5×1012 s−1)e−26000K/Tk =\left( 6.5 \times10^{12}{\text{ }s}^{- 1} \right)e^{- 26000K/T}
    is followed for the decomposition of compound A. The activation energy for the reaction is ____\_\_\_\_ kJ mol−1kJ\ mol^{- 1}. [nearest integer] (Given: R=8.314 J K−1 mol−1R = 8.314\text{ }J{\text{ }K}^{- 1}{\text{ }mol}^{- 1} )

  4. Question 4

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 11 Apr 2023 (same type asked 5 times) See all 5 of this type

    44
    Thin layer chromatography of a mixture shows the following observation: The correct order of elution in the silica gel column chromatography is

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  5. Question 5

    The p-Block Elements. Asked once: 7 Apr 2025 (same type asked 5 times) See all 5 of this type

    118
    The correct statements from the following are : (A) Tl3+{Tl}^{3 +} is a powerful oxidising agent (B) Al3+{Al}^{3 +} does not get reduced easily (C) Both Al3+{Al}^{3 +} and Tl3+{Tl}^{3 +} are very stable in solution (D) Tl+{Tl}^{+}is more stable than Tl3+{Tl}^{3 +} (E) Al3+{Al}^{3 +} and Tl+{Tl}^{+}are highly stable Choose the correct answer from the options given below :

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