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Day 423: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 23 Jan 2026 S2

    50
    In compound (Q), the percentage of oxygen is ____\_\_\_\_ %. (Nearest integer)

  2. Question 2

    Amines. Asked once: 23 Jan 2026 S2

    44
    Given below are two statements: Statement I: Benzene-1,2-diamine can be synthesized from 1,2-di-n-propylbenzene using simpler reagents in the order (i) Acidic KMnO4{KMnO}_{4}, (ii) Ammonia, (iii) Bromine and alkali Statement II : 4-Methylaniline can be converted into 3,5-dibromotoluene using reagents in the order (i) Bromine- H2OH_{2}O (ii) NaNO2/HCl(0−5 ∘C){NaNO}_{2}/HCl\left( 0 - 5\ ^{\circ}C \right) (iii) aq. H3PO2H_{3}{PO}_{2}. In the light of the above statements, choose the correct answer from the options given below

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  3. Question 3

    Biomolecules. Asked once: 8 Apr 2024

    41
    The incorrect statement regarding the given structure is

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  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 2 Apr 2025

    45
    A molecule with the formula AX4YAX_{4}Y has all its elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among AA, XX and YY. Elements XX and YY have first and second highest electronegativity values respectively among all the known elements. The shape of the molecule is :

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  5. Question 5

    Chemical Kinetics. Asked once: 22 Jan 2026 S1

    48
    The temperature at which the rate constants of the given below two gaseous reactions become equal is ____\_\_\_\_ K. (Nearest integer).
    X⟶Y k1=106e−30000 TP⟶Q k2=104e−24000 T\begin{gathered}X \longrightarrow Y\ k_{1} = 10^{6}e^{\frac{- 30000}{\text{ }T}} \\ P \longrightarrow Q\ k_{2} = 10^{4}e^{\frac{- 24000}{\text{ }T}}\end{gathered}
    Given : ln⁡10=2.303\ln10 = 2.303