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Day 431: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 21 Jan 2026 S1

    36
    An organic compound "P" of molecular formula C6H12O3C_{6}H_{12}O_{3} gives positive lodoform test but negative Tollen's test. When "P" is treated with dilute acid, it produces "Q". "Q" gives positive Tollen's test and also iodoform test. The structure of " P " is :

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  2. Question 2

    Amines. Asked once: 22 Jan 2026 S2

    30
    The final product [B]\lbrack B\rbrack is :

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  3. Question 3

    Biomolecules. Asked once: 30 Jan 2024

    144
    The total number of correct statements, regarding the nucleic acids is ______ A. RNA is regarded as the reserve of genetic information. B. DNA molecule self-duplicates during cell division C. DNA synthesizes proteins in the cell. D. The message for the synthesis of particular proteins is present in DNA E. Identical DNA strands are transferred to daughter cells.

  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 24 Jan 2025

    107
    Given below are two statements: Statement(I) : Experimentally determined oxygen-oxygen bond lengths in the O3O_{3} are found to be same and the bond length is greater than that of a O=OO = O (double bond) but less than that of a single (O−O)(O - O) bond. Statement (II) : The strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for the fact that the bond length in ozone is smaller than that of a double bond (O=O)(O = O) but more than that of a single bond (O−O)(O - O). In the light of the above statements, choose the correct answer from the options given below:

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  5. Question 5

    Chemical Kinetics. Asked once: 4 Apr 2025

    115
    Consider the following plots of log of rate constant k(log⁡k)k(\log k) vs 1 T\frac{1}{\text{ }T} for three different reactions. The correct order of activation energies of these reactions is.

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