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Day 334: JEE Mains Chemistry

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

  1. Question 1

    Solutions. Asked once: 28 Jun 2022 (same type asked 5 times) See all 5 of this type

    143
    2.5 g2.5\text{ }g of protein containing only glycine (C2H5NO2)\left( C_{2}H_{5}NO_{2} \right) is dissolved in water to make 500 mL500\text{ }mL of solution. The osmotic pressure of this solution at 300 K300\text{ }K is found to be 5.03×10−35.03 \times10^{- 3} bar. The total number of glycine units present in the protein is (Given: R=0.083 LbarK−1 mol−1R = 0.083\text{ }LbarK^{- 1}{\text{ }mol}^{- 1} )

  2. Question 2

    The d- and f-Block Elements. Asked once: 2021 Paper 20 (same type asked 5 times) See all 5 of this type

    57
    The number of ff electrons in the ground state electronic configuration of Np(Z=93)Np(Z= 93) is (Nearest integer)

  3. Question 3

    The d- and f-Block Elements. Asked once: 2021 Paper 17 (same type asked 5 times) See all 5 of this type

    39
    To an aqueous solution containing ions such as Al3+,Zn2+,Ca2+,Fe3+,Ni2+,Ba2+Al^{3 +},Zn^{2 +},Ca^{2 +},Fe^{3 +},Ni^{2 +},Ba^{2 +} and Cu2+Cu^{2 +} was added conc. HClHCl, followed by H2 SH_{2}\text{ }S. The total number of cations precipitated during this reaction is/are:

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  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 25 Jan 2023 (same type asked 5 times) See all 5 of this type

    59
    The total number of lone pairs of electrons on oxygen atoms of ozone is

  5. Question 5

    Structure of Atom. Asked once: 2021 Paper 11 (same type asked 5 times) See all 5 of this type

    24
    Azimuthal quantum number of valence electrons of Ga+1Ga^{+ 1} is (Atomic number of Ga=31Ga = 31 )

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