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Day 66: JEE Mains Chemistry

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

  1. Question 1

    Structure of Atom. This type asked 3 times: 2021 Paper 20, 5 Apr 2024, 6 Apr 2024. This one: 6 Apr 2024 See all 3 of this type

    149
    For hydrogen atom, energy of an electron in first excited state is −3.4eV,K.E- 3.4eV,K.E. of the same electron of hydrogen atom is xeVxeV. Value of xx is ____ ×10−1eV\times10^{- 1}eV. (Nearest integer)

  2. Question 2

    The d- and f-Block Elements. This type asked 3 times: 26 Jun 2022, 4 Apr 2024, 6 Apr 2024. This one: 6 Apr 2024 See all 3 of this type

    59
    Among CrO,Cr2O3CrO,Cr_{2}O_{3} and CrO3CrO_{3}, the sum of spin-only magnetic moment values of basic and amphoteric oxides is ____ 10−2BM10^{- 2}BM (nearest integer). (Given atomic number of CrCr is 24)

  3. Question 3

    The p-Block Elements. This type asked 3 times: 26 Jul 2022, 6 Apr 2023, 6 Apr 2024. This one: 6 Apr 2024 See all 3 of this type

    37
    Given below are two statements: Statement I: Gallium is used in the manufacturing of thermometers. Statement II: A thermometer containing gallium is useful for measuring the freezing point (256 K)(256\text{ }K) of brine solution. In the light of the above statement, choose the correct answer from the options given below:

    Tap an option to check your answer.

  4. Question 4

    The p-Block Elements. This type asked 3 times: 31 Jan 2024, 4 Apr 2024, 6 Apr 2024. This one: 6 Apr 2024 See all 3 of this type

    125
    During the detection of acidic radical present in a salt, a student gets a pale-yellow precipitate soluble with difficulty in NH4OHNH_{4}OH solution when sodium carbonate extract was first acidified with dil. HNO3HNO_{3} and then AgNO3AgNO_{3} solution was added. This indicates presence of:

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  5. Question 5

    Amines. This type asked 3 times: 8 Apr 2023, 29 Jan 2024, 5 Apr 2024. This one: 5 Apr 2024 See all 3 of this type

    58
    The number of halobenzenes from the following that can be prepared by Sandmeyer's reaction is .......