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Day 4: JEE Mains Chemistry

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

  1. Question 1

    Coordination Compounds. This type asked 9 times: 26 Jun 2022, 10 Apr 2023, 15 Apr 2023, 31 Jan 2024, 4 Apr 2024, 8 Apr 2024, 23 Jan 2025, 2 Apr 2025, 28 Jan 2026 S2. This one: 28 Jan 2026 S2 See all 9 of this type

    50
    The number of isoelectronic species among Sc3+{Sc}^{3 +}, Cr2+,Mn3+,Co3+{Cr}^{2 +},{Mn}^{3 +},{Co}^{3 +} and Fe3+{Fe}^{3 +} is ' n '. If ' n ' moles of AgCl is formed during the reaction of complex with formula CoCl3(en)2NH3{CoCl}_{3}(en)_{2}{NH}_{3} with excess of AgNO3{AgNO}_{3} solution, then the number of electrons present in the t2gt_{2g} orbitals of the complex is ____\_\_\_\_ .

  2. Question 2

    Coordination Compounds. This type asked 9 times: 2021 Paper 16, 2021 Paper 19, 2021 Paper 26, 28 Jul 2022, 13 Apr 2023, 5 Apr 2024, 9 Apr 2024, 4 Apr 2025, 28 Jan 2026 S1. This one: 28 Jan 2026 S1 See all 9 of this type

    48
    X is the number of geometrical isomers exhibited by [Pt(NH3)(H2O)BrCl]\left\lbrack Pt\left( {NH}_{3} \right)\left( H_{2}O \right)BrCl \right\rbrack. Y is the number of optically inactive isomer(s) exhibited by [CrCl2(ox)2]3−\left\lbrack {CrCl}_{2}(ox)_{2} \right\rbrack^{3 -} Z is the number of geometrical isomers exhibited by [Co(NH3)3(NO2)3]\left\lbrack Co\left( {NH}_{3} \right)_{3}\left( {NO}_{2} \right)_{3} \right\rbrack The value of X+Y+ZX + Y + Z is ____\_\_\_\_ .

  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 9 times: 2021 Paper 20, 27 Jun 2022, 28 Jun 2022, 27 Jul 2022, 13 Apr 2023, 22 Jan 2025, 24 Jan 2025, 22 Jan 2026 S1, 23 Jan 2026 S2. This one: 23 Jan 2026 S2 See all 9 of this type

    40
    In Carius method 0.2425 g of an organic compounds gave 0.5253 g silver chloride. The percentage of chlorine in the organic compound is

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  4. Question 4

    Coordination Compounds. This type asked 9 times: 2021 Paper 24, 27 Jun 2022, 29 Jul 2022, 10 Apr 2023, 12 Apr 2023, 22 Jan 2025, 2 Apr 2025, 4 Apr 2025, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 9 of this type

    38
    Given below are two statements: Statement I: Crystal Field Stabilization Energy (CFSE) of [Cr(H2O)6]2+\left\lbrack Cr\left( H_{2}O \right)_{6} \right\rbrack^{2 +} is greater than that of [Mn(H2O)6]2+\left\lbrack Mn\left( H_{2}O \right)_{6} \right\rbrack^{2 +}. Statement II: Potassium ferricyanide has a greater spin-only magnetic moment than sodium Ferrocyanide. In the light of the above statements, choose the correct answer from the options given below:

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  5. Question 5

    Chemical Bonding and Molecular Structure. This type asked 9 times: 2021 Paper 23, 2021 Paper 24, 25 Jul 2022, 28 Jul 2022, 29 Jan 2024, 4 Apr 2024, 9 Apr 2024, 28 Jan 2025, 4 Apr 2025. This one: 4 Apr 2025 See all 9 of this type

    28
    Which of the following molecule(s) show/s paramagnetic behaviour? (A) O2O_{2} (B) N2N_{2} (C) F2F_{2} (D) S2S_{2} (E) Cl2Cl_{2} Choose the correct answer from the options given below :

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