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Day 357: JEE Mains Chemistry

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

  1. Question 1

    Classification of Elements and Periodicity. Asked once: 2021 Paper 26 (same type asked 6 times) See all 6 of this type

    41
    The correct order of electron gain enthalpy is:

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  2. Question 2

    The p-Block Elements. Asked once: 6 Apr 2024 (same type asked 5 times) See all 5 of this type

    132
    The number of ions from the following that are expected to behave as oxidising agent is:
    Sn4+,Sn2+,Pb2+,Tl3+,Pb4+,Tl+Sn^{4 +},Sn^{2 +},Pb^{2 +},Tl^{3 +},Pb^{4 +},Tl^{+}

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  3. Question 3

    Classification of Elements and Periodicity. Asked once: 2021 Paper 16 (same type asked 5 times) See all 5 of this type

    37
    Match the column.
    HydroxideNature
    (1) Be(OH)2Be(OH)_{2}(A) Acidic
    (2) B(OH)3B(OH)_{3}(B) Basic
    (3) NaOHNaOH(C) Amphoteric
    (4) Ca(OH)2Ca(OH)_{2}
    (5) Al(OH)3Al(OH)_{3}

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  4. Question 4

    Solutions. Asked once: 30 Jan 2023 (same type asked 5 times) See all 5 of this type

    144
    Lead storage battery contains 38%38\% by weight solution of H2SO4H_{2}SO_{4}. The van't Hoff factor is 2.67 at this concentration. The temperature in Kelvin at which the solution in the battery will freeze is _ __(Nearest integer). Given Kf=1.8 K kg mol−1K_{f}= 1.8\text{ }K\text{ }kg{\text{ }mol}^{- 1}

  5. Question 5

    Chemical Bonding and Molecular Structure. Asked once: 25 Jun 2022 (same type asked 5 times) See all 5 of this type

    143
    Amongst BeF2,BF3,H2O,NH3,CCl4BeF_{2},BF_{3},H_{2}O,NH_{3},CCl_{4} and HClHCl, the number of molecules with non-zero net dipole moment is