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Day 253: JEE Mains Chemistry

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

  1. Question 1

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 27 Jan 2024 (same type asked 3 times) See all 3 of this type

    128
    The technique used for purification of steam volatile water immiscible substance is:

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  2. Question 2

    Amines. Asked once: 2021 Paper 3 (same type asked 3 times) See all 3 of this type

    46
    Which of the following reaction/s will not give pp-aminoazobenzene? (A) Nitrobenzene: (i) Sn/HClSn/HCl, (ii) HNO2HNO_{2}, (iii) aniline (B) Nitrobenzene: (i) NaBH4NaBH_{4}, (ii) NaOHNaOH, (iii) aniline (C) Aniline: (i) HNO2HNO_{2}, (ii) aniline, HClHCl

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  3. Question 3

    Coordination Compounds. Asked once: 5 Apr 2026 S1 (same type asked 3 times) See all 3 of this type

    37
    Given below are two statements : Statement I : Each electron in ege_{g} orbitals destabilizes the orbitals by +0.6Δ0+ 0.6\Delta_{0} and each electron in the t2gt_{2g} orbitals stabilizes the orbitals by −0.4Δ0- 0.4\Delta_{0} in an octahedral field on the basis of crystal field theory. Statement II : All the d-orbitals of the transition metals have the same energy in their free atomic state but when a complex is formed the ligands destroy the degeneracy of these orbitals on the basis of crystal field theory. In the light of the above statements, choose the correct answer from the options given below.

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  4. Question 4

    Electrochemistry. Asked once: 28 Jun 2022 (same type asked 3 times) See all 3 of this type

    56
    The solubility product of a sparingly soluble salt A2X3A_{2}X_{3} is 1.1×10−231.1 \times10^{- 23}. If specific conductance of the solution is 3×10−5 S m−13 \times10^{- 5}\text{ }S{\text{ }m}^{- 1}, the limiting molar conductivity of the solution is x×10−3 S m2 mol−1x \times10^{- 3}\text{ }S{\text{ }m}^{2}{\text{ }mol}^{- 1}. The value of xx is

  5. Question 5

    Equilibrium. Asked once: 2021 Paper 16 (same type asked 3 times) See all 3 of this type

    29
    PCl5⇌PCl3+Cl2, KC=1.844PCl_{5}\rightleftharpoons PCl_{3}+Cl_{2},{\text{ }K}_{C}= 1.844. If 3 moles of PCl5PCl_{5} are taken in 1 L1\text{ }L vessel. Find equilibrium concentration of PCl5PCl_{5}.

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