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Day 417: JEE Mains Chemistry

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

  1. Question 1

    Haloalkanes and Haloarenes. Asked once: 7 Apr 2025

    45
    The reactions which cannot be applied to prepare an alkene by elimination, are: (A) 1-bromo-2-methylcyclohexane with NaOEtNaOEt (B) 2-bromobutane with KOHKOH (aq.) (C) (CH3)3C−Br(CH_{3})_{3}C-Br with NaOMeNaOMe (D) phenol with Na2Cr2O7/H2SO4Na_{2}Cr_{2}O_{7}/H_{2}SO_{4} (E) (CH3)3C−OH(CH_{3})_{3}C-OH with Cu at 573 K. Choose the correct answer from the option given below :

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  2. Question 2

    Hydrocarbons. Asked once: 2 Apr 2026 S2

    43
    Identify compounds A and E in the following reaction sequence.

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  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 23 Jan 2026 S1

    41
    Match List-I with List-II.
    List-I Functional group (detection)List-II Change observed during detection
    (A)Unsaturation (Baeyer's test)(I)Red colour Appears
    (B)Alcoholic group (Ceric ammonium nitrate test)(II)Silver mirror appears
    (C)Aldehyde group (Tollen's reagent)(III)Violet colour appears
    (D)Phenolic group ( FeCl3{FeCl}_{3} test)(IV)Discharge of pink colour
    Choose the correct answer from the options given below:

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  4. Question 4

    Organic Reaction Mechanisms. Asked once: 28 Jan 2025

    33
    A molecule ("P") on treatment with acid undergoes rearrangement and gives ("Q") ("Q") on ozonolysis followed by reflux under alkaline condition gives ("R"). The structure of ("R") is given below : The structure of ("P") is

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  5. Question 5

    Solutions. Asked once: 4 Apr 2025

    26
    XYXY is the membrane / partition between two chambers 1 and 2 containing sugar solutions of concentration c1c_{1} and c2(c1>c2)molL−1c_{2}\left( c_{1}>c_{2} \right)molL^{- 1}. For the reverse osmosis to take place identify the correct condition. (Here p1p_{1} and p2p_{2} are pressures applied on chamber 1 and 2) (A) Membrane/Partition; Cellophane, p1>πp_{1} > \pi (B) Membrane/Partition ; Porous. p2>πp_{2} > \pi (C) Membrane/Partition ; Parchment paper, p1>πp_{1} > \pi (D) Membrane/Partition : Cellophane, p2>πp_{2} > \pi Choose the correct answer from the option given below:

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