PYQ Vault

Day 506: 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: 1 Feb 2024

    43
    Ionic reactions with organic compounds proceed through: (A) Homolytic bond cleavage (B) Heterolytic bond cleavage (C) Free radical formation (D) Primary free radical (E) Secondary free radical Choose the correct answer from the options given below:

    Tap an option to check your answer.

  2. Question 2

    Organic Reaction Mechanisms. Asked once: 25 Jun 2022

    136
    In the given reaction 'A' can be

    Tap an option to check your answer.

  3. Question 3

    Solutions. Asked once: 2021 Paper 20

    54
     1 kg\ 1\text{ }kg of 0.75 molal aqueous solution of sucrose can be cooled up to −4∘C-4^{\circ}C before freezing. The amount of ice (in g) that will be separated out is (Nearest integer) [Given: Kf(H2O)=1.86 K kg mol−1K_{f}\left( H_{2}O \right)= 1.86\text{ }K\text{ }kg{\text{ }mol}^{- 1} ]
  4. Question 4

    Structure of Atom. Asked once: 29 Jun 2022

    32
    Which of the following statements are correct? (A) The electronic configuration of CrCr is [Ar]3 d5\lbrack Ar\rbrack 3{\text{ }d}^{5} 4s14s^{1}. (B) The magnetic quantum number may have a negative value. (C) In the ground state of an atom, the orbitals are filled in order of their increasing energies. (D) The total number of nodes are given by n−2n - 2. Choose the most appropriate answer from the options given below:

    Tap an option to check your answer.

  5. Question 5

    The d- and f-Block Elements. Asked once: 2021 Paper 18

    49
    The incorrect statement is:

    Tap an option to check your answer.