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Day 34: JEE Mains Chemistry

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

  1. Question 1

    Amines. This type asked 4 times: 1 Feb 2024, 8 Apr 2024, 23 Jan 2025, 28 Jan 2026 S2. This one: 28 Jan 2026 S2 See all 4 of this type

    41
    Total number of alkali insoluble solid sulphonamides obtained by reaction of given amines with Hinsberg's reagent is ____\_\_\_\_ . Aniline, N-Methylaniline, Methenamine, N,NN,N-Dimethylmethanamine, N-Methyl methanamine, Phenylmethanamine, N -propylaniline, N -phenylaniline, N, N-Dimethylaniline, Allyl amine, Isopropyl amine

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  2. Question 2

    Classification of Elements and Periodicity. This type asked 4 times: 28 Jul 2022, 25 Jan 2023, 10 Apr 2023, 28 Jan 2026 S2. This one: 28 Jan 2026 S2 See all 4 of this type

    28
    Consider the elements N,P,O,S,ClN,P,O,S,Cl and F. The number of valence electrons present in the elements with most and least metallic character from the above list is respectively.

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  3. Question 3

    Equilibrium. This type asked 4 times: 6 Apr 2023, 23 Jan 2026 S2, 24 Jan 2026 S2, 28 Jan 2026 S2. This one: 28 Jan 2026 S2 See all 4 of this type

    29
    Observe the following equilibrium in a 1 L flask.
    A(g)⇌B(g)A(g) \rightleftharpoons B(g)
    At T(K)T(K), the equilibrium concentrations of A and B are 0.5 M and 0.375 M respectively. 0.1 moles of A are added into the flask and heated to T(K)T(K) to establish the equilibrium again. The new equilibrium concentrations (in MM ) of AA and BB are respectively.

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  4. Question 4

    Chemical Thermodynamics. This type asked 4 times: 27 Jun 2022, 31 Jan 2024, 4 Apr 2025, 28 Jan 2026 S1. This one: 28 Jan 2026 S1 See all 4 of this type

    26
    20.0dm320.0dm^{3} of an ideal gas ' X ' at 600 K and 0.5 MPa undergoes isothermal reversible expansion until pressure of the gas is 0.2 MPa . Which of the following option is correct? (Given: log⁡2=0.3010\log2 = 0.3010 and log⁡5=0.6989\log5 = 0.6989 )

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  5. Question 5

    Electrochemistry. This type asked 4 times: 10 Apr 2023, 4 Apr 2025, 21 Jan 2026 S1, 24 Jan 2026 S2. This one: 24 Jan 2026 S2 See all 4 of this type

    49
    Molar conductivity of a weak acid HQ of concentration 0.18 M was found to be 1/301/30 of the molar conductivity of another weak acid HZ with concentration of 0.02 M. If λQ−0\lambda_{Q^{-}}^{0} happened to be equal with λZ−0\lambda_{Z^{-}}^{0}, then the difference of the pKa{pK}_{a} values of the two weak acids (pKa(HQ)−pKa(HZ))\left( {pK}_{a}(HQ) - {pK}_{a}(HZ) \right) is ____\_\_\_\_ (Nearest integer). [Given : degree of dissociation (α)≪1(\alpha) \ll 1 for both weak acids, λ∘\lambda^{\circ} : limiting molar conductivity of ions]