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Day 225: JEE Mains Chemistry

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

  1. Question 1

    Classification of Elements and Periodicity. Asked once: 28 Jun 2022 (same type asked 5 times) See all 5 of this type

    129
    Among the following basic oxide is:

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  2. Question 2

    Electrochemistry. Asked once: 31 Jan 2023 (same type asked 5 times) See all 5 of this type

    144
    The resistivity of a 0.8M0.8M solution of an electrolyte is 5×10−3Ωcm5 \times10^{- 3}\Omega cm. Its molar conductivity is ____×104Ω−1 cm2 mol−1\_\_\_\_\times10^{4}\Omega^{- 1}{\text{ }cm}^{2}{\text{ }mol}^{- 1}(Nearest integer)

  3. Question 3

    Solutions. Asked once: 10 Apr 2023 (same type asked 5 times) See all 5 of this type

    146
    An aqueous solution of volume 300 cm3300{\text{ }cm}^{3} contains 0.63 g0.63\text{ }g of protein. The osmotic pressure of the solution at 300 K300\text{ }K is 1.29 mbar. The molar mass of the protein is___ gmol−1gmol^{- 1} Given: R=0.083 LR = 0.083\text{ }L bar K  −1 mol−1\ ^{- 1}{\text{ }mol}^{- 1}

  4. Question 4

    Equilibrium. Asked once: 22 Jan 2025 (same type asked 5 times) See all 5 of this type

    112
    The molar solubility(s) of zirconium phosphate with molecular formula (Zr4+)3(PO43−)4\left( Zr^{4 +} \right)_{3}\left( PO_{4}^{3 -} \right)_{4} is given by relation :

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  5. Question 5

    Structure of Atom. Asked once: 29 Jul 2022 (same type asked 5 times) See all 5 of this type

    122
    Given below are the quantum numbers for 4 electrons. A. n=3,l=2,ml=1,ms=+1/2n = 3,l = 2,m_{l}= 1,m_{s}= + 1/2 B. n=4,l=1,ml=0,ms=+1/2n = 4,l = 1,m_{l}= 0,m_{s}= + 1/2 C. n=4,l=2,ml=−2,ms=−1/2n = 4,l = 2,m_{l}= - 2,m_{s}= - 1/2 D. n=3,l=1,ml=−1,ms=+1/2n = 3,l = 1,m_{l}= - 1,m_{s}= + 1/2 The correct order of increasing energy is:

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