PYQ Vault

Day 482: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. Asked once: 2021 Paper 20

    48
    The unit of the van der Waals gas equation parameter 'a' in (P+an2 V2)(V−nb)=nRT\left( P +\frac{an^{2}}{{\text{ }V}^{2}} \right)(V - nb) = nRT is :

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  2. Question 2

    Structure of Atom. Asked once: 8 Apr 2023

    60
    The number of following statement/s which is/are incorrect is___ (A) Line emission spectra are used to study the electronic structure (B) The emission spectra of atoms in the gas phase show a continuous spread of wavelength from red to violet (C) An absorption spectrum is like the photographic negative of an emission spectrum (D) The element helium was discovered in the sun by spectroscopic method
  3. Question 3

    The d- and f-Block Elements. Asked once: 28 Jul 2022

    129
    Given below are two statements: One is labelled as Assertion AA and the other is labelled as Reason RR Assertion A: Permanganate titrations are not performed in presence of hydrochloric acid. Reason R: Chlorine is formed as a consequence of oxidation of hydrochloric acid. In the light of the above statements, choose the correct answer from the options given below

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  4. Question 4

    The p-Block Elements. Asked once: 27 Jan 2024

    147
    1 mole of PbSPbS is oxidised by " XX " moles of O3O_{3} to get "Y" moles of O2.X+Y=O_{2}.X + Y =____
  5. Question 5

    Alcohols, Phenols and Ethers. Asked once: 27 Jan 2024

    130
    Match List-I with List-II. Choose the correct answer from the options given below:

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