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Day 133: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. Asked once: 15 Apr 2023 (same type asked 5 times) See all 5 of this type

    53
    The total change in the oxidation state of manganese involved in the reaction of KMnO4KMnO_{4} and potassium iodide in the acidic medium is____

  2. Question 2

    Biomolecules. Asked once: 29 Jan 2024 (same type asked 5 times) See all 5 of this type

    122
    Match List I with List II
    List I (Biopolymer)List II (Monomer)
    A.StarchI.nucleotide
    B.CelluloseII.α\alpha-glucose
    C.Nucleic acidIII.β\beta-glucose
    D.ProteinIV.α\alpha-amino acid
    Choose the correct answer from the options given below.

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  3. Question 3

    Chemical Bonding and Molecular Structure. Asked once: 6 Apr 2024 (same type asked 5 times) See all 5 of this type

    54
    Number of molecules from the following which can exhibit hydrogen bonding is _____ . (nearest integer)

  4. Question 4

    Coordination Compounds. Asked once: 24 Jan 2025 (same type asked 5 times) See all 5 of this type

    112
    When Ethane-1,2-diamine is added progressively to an aqueous solution of Nickel (II) chloride, the sequence of colour change observed will be :

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  5. Question 5

    Chemical Kinetics. Asked once: 24 Jan 2023 (same type asked 5 times) See all 5 of this type

    123
    A student has studied the decomposition of a gas AB3AB_{3} at 25∘C25^{\circ}C. He obtained the following data.
    pp (mmHg)50100200400
    Relative t1/2t_{1/2} (s)4210.5
    The order of the reaction is

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