PYQ Vault
EbooksTutor

Day 257: JEE Mains Chemistry

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

  1. Question 1

    Structure of Atom. Asked once: 26 Jul 2022 (same type asked 3 times) See all 3 of this type

    53
    The wavelength of an electron and a neutron will become equal when the velocity of the electron is xx times the velocity of neutron. The value of xx is. (Nearest Integer) (Mass of electron is 9.1×10−31 kg9.1 \times10^{- 31}\text{ }kg and mass of neutron is 1.6×10−27 kg1.6 \times10^{- 27}\text{ }kg )

  2. Question 2

    The d- and f-Block Elements. Asked once: 27 Jul 2022 (same type asked 3 times) See all 3 of this type

    41
    Given below are two statements: Statement I: Iron (III) catalyst, acidified K2Cr2O7K_{2}Cr_{2}O_{7} and neutral KMnO4KMnO_{4} have the ability to oxidise I−I^{-}to I2I_{2} independently. Statement II: Manganate ion is paramagnetic in nature and involves pπ−pπp\pi - p\pi bonding. In the light of the above statements, choose the correct answer from the options.

    Tap an option to check your answer.

  3. Question 3

    Chemical Bonding and Molecular Structure. Asked once: 2021 Paper 4 (same type asked 3 times) See all 3 of this type

    45
    Which among the following species has unequal bond lengths?

    Tap an option to check your answer.

  4. Question 4

    Classification of Elements and Periodicity. Asked once: 28 Jan 2025 (same type asked 3 times) See all 3 of this type

    26
    The incorrect decreasing order of atomic radii is :

    Tap an option to check your answer.

  5. Question 5

    Hydrocarbons. Asked once: 28 Jul 2022 (same type asked 3 times) See all 3 of this type

    43
    Choose the correct option for the following reactions.

    Tap an option to check your answer.