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Day 84: JEE Mains Chemistry

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

  1. Question 1

    Hydrocarbons. This type asked 2 times: 23 Jan 2025, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 2 of this type

    40
    n-Butane on monochlorination under photochemical conditions gives an optically active compound "P". "P" on further chlorination gives dichloro compounds. The number of dichloro compounds obtained (ignore stereoisomers) is :

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  2. Question 2

    Chemical Thermodynamics. This type asked 2 times: 24 Jan 2026 S1, 6 Apr 2026 S2. This one: 6 Apr 2026 S2 See all 2 of this type

    29
    Match List-I with List-II. Given V1V_{1} and V2V_{2} are initial and final volumes respectively:
    List-I (Isothermal process)List-II (Expression)
    (A)Reversible expansion(I)
    q=0q = 0
    (B)Free expansion(II)
    q=nRTlnV2 V1q = nRTln\frac{V_{2}}{{\text{ }V}_{1}}
    (C)Irreversible Compression(III)
    w=−pext (V2−V1)w = - p_{\text{ext~}}\left( V_{2} - V_{1} \right)
    (D)Cyclic reversible(IV)
    qrev T=0\frac{q_{\text{rev~}}}{T} = 0
    Choose the correct answer from the options given below :

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  3. Question 3

    Hydrocarbons. This type asked 2 times: 2 Apr 2026 S1, 6 Apr 2026 S2. This one: 6 Apr 2026 S2 See all 2 of this type

    47
    An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with Cl2/hv{Cl}_{2}/hv, (Y) gives only one monochlorinated product (Z). The total number of primary carbon atoms in (Y) is ____\_\_\_\_ .

  4. Question 4

    The d- and f-Block Elements. This type asked 2 times: 27 Jan 2024, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 2 of this type

    35
    The correct statements among the following are : (A) Basic vanadium oxide is used in the manufacture of H2SO4H_{2}{SO}_{4}. (B) The spin-only magnetic moment value of the transition metal halide employed in ZieglerNatta polymerization is 2.84 BM . (C) The p-block metal compound employed in Ziegler-Natta polymerization has the metal in +3 oxidation state. (D) The number of electrons present in the outer most 'd' orbital of metal halide employed in Wacker process is 8. Choose the correct answer from the options given below :

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  5. Question 5

    Aldehydes, Ketones and Carboxylic Acids. This type asked 2 times: 30 Jan 2024, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 2 of this type

    41
    Given below are two statements : Statement-I : The condensation reaction between CH3−CH=O{CH}_{3} - CH = O and semicarbazide, H2N−NH−CO−NH2{H}_{2}N - NH - CO - {NH}_{2}, under optimum pH will produce CH3−CH=N−CO−NH−NH2{CH}_{3} - CH = N - CO - NH - {NH}_{2} Statement-II : The molecule Ph−CH(OH)(OCH3)Ph - CH(OH)(O{CH}_{3}) will generate Ph−CH=OPh - CH = O in the presence of dilute acid. In the light of the above statements, choose the correct answer from the options given below:

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