PYQ Vault
EbooksTutor

Day 46: JEE Mains Chemistry

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

  1. Question 1

    Organic Chemistry - Some Basic Principles and Techniques. Asked 3 times: 31 Jan 2024, 2 Apr 2025, 4 Apr 2025 See all 3 times it was asked

    109
    Match List-I with List-II -
    List-I (Separation of)List-II (Separation technique)
    (A)Aniline from aniline-water mixture(I)Simple distillation
    (B)Glycerol from spent-lye in soap industry(II)Fractional distillation
    (C)Different fractions of crude oil in petroleum industry(III)Distillation at reduced pressure
    (D)Chloroform Aniline mixture(IV)Steam distillation
    Choose the correct answer from the options given below:

    Tap an option to check your answer.

  2. Question 2

    Chemical Thermodynamics. Asked 3 times: 2021 Paper 19*, 26 Jun 2022*, 8 Apr 2024 (* = numbers or wording changed that year) See all 3 times it was asked

    141
    Δvap H⊖\Delta_{\text{vap~}}H^{\ominus} for water is +40.49 kJ mol−1+ 40.49\text{ }kJ{\text{ }mol}^{- 1} at 1 bar and 100∘C100^{\circ}C. Change in internal energy for this vapourisation under same condition is _______ JJ mol−1mol^{- 1}. (Integer answer) (Given R=8.3JK−1 mol−1R = 8.3JK^{- 1}{\text{ }mol}^{- 1} )

  3. Question 3

    The p-Block Elements. Asked 3 times: 2021 Paper 5, 2021 Paper 13, 1 Feb 2024 See all 3 times it was asked

    126
    The strongest reducing agent among the following is:

    Tap an option to check your answer.

  4. Question 4

    The d- and f-Block Elements. Asked 3 times: 14 Jun 2022, 24 Jan 2023, 29 Jan 2024 See all 3 times it was asked

    127
    A reagent which gives brilliant red precipitate with Nickel ions in basic medium is

    Tap an option to check your answer.

  5. Question 5

    Biomolecules. Asked 3 times: 29 Jun 2022, 25 Jul 2022, 27 Jan 2024 See all 3 times it was asked

    137
    Which structure of protein remains intact after coagulation of egg white on boiling?

    Tap an option to check your answer.