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Day 439: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 4 Apr 2025

    29
    Aldol condensation is a popular and classical method to prepare α,β\alpha,\beta- unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which one of the following is not a product of intramolecular aldol condensation?

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  2. Question 2

    Amines. Asked once: 21 Jan 2026 S2

    28
    Consider the above sequence of reactions. The number of bromine atom(s) in the final product (P) will be:

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  3. Question 3

    Biomolecules. Asked once: 27 Jan 2024

    31
    Two nucleotides are joined together by a linkage known as:

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  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 6 Apr 2024

    32
    Match List I with List II:
    List I (Molecule / Species)List II (Property / Shape)
    A.
    SO2Cl2SO_{2}Cl_{2}
    		I.Paramagnetic
    B.
    NONO
    		II.Diamagnetic
    C.
    NO2−NO_{2}^{-}
    		III.Tetrahedral
    D.
    I3−I_{3}^{-}
    		IV.Linear
    Choose the correct answer from the options given below:

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  5. Question 5

    Chemical Kinetics. Asked once: 2 Apr 2025

    121
    For the reaction A→BA \rightarrow B the following graph was obtained. The time required (in seconds) for the concentration of A to reduce to 2.5 g L−12.5\text{ }g{\text{ }L}^{- 1} (if the initial concentration of AA was 50 g L−150\text{ }g{\text{ }L}^{- 1} ) is ____ . (Nearest integer) Given : log⁡2=0.3010\log2 = 0.3010