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Day 313: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. Asked once: 29 Jan 2024 (same type asked 4 times) See all 4 of this type

    55
    A solution of H2SO4H_{2}SO_{4} is 31.4%H2SO431.4\%H_{2}SO_{4} by mass and has a density of 1.25 g/mL1.25\text{ }g/mL. The molarity of the H2SO4H_{2}SO_{4} solution is ___ MM (nearest integer) [Given molar mass of H2SO4=98 g mol−1H_{2}SO_{4}= 98\text{ }g{\text{ }mol}^{- 1} ]

  2. Question 2

    Equilibrium. Asked once: 2021 Paper 4 (same type asked 4 times) See all 4 of this type

    50
    The solubility of Ca(OH)2Ca(OH)_{2} in water is: [Given : The solubility product of Ca(OH)2Ca(OH)_{2} in water =5.5×10−6= 5.5 \times10^{- 6} ]

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  3. Question 3

    Alcohols, Phenols and Ethers. Asked once: 8 Apr 2023 (same type asked 4 times) See all 4 of this type

    42
    Given below are two statements: One is labelled as Assertion AA and the other is labelled as Reason R. Assertion A: Butan -1- ol has higher boiling point than ethoxyethane. Reason R: Extensive hydrogen bonding leads to stronger association of molecules. In the light of the above statements, choose the correct answer from the options given below:

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  4. Question 4

    The d- and f-Block Elements. Asked once: 2021 Paper 25 (same type asked 4 times) See all 4 of this type

    60
    Dichromate ion is treated with base, the oxidation number of CrCr in the product formed is:

  5. Question 5

    Electrochemistry. Asked once: 13 Apr 2023 (same type asked 4 times) See all 4 of this type

    60
    A metal surface of 100 cm2100{\text{ }cm}^{2} area has to be coated with nickel layer of thickness .001 mm.001\text{ }mm. A current of 2 A2\text{ }A was passed through a solution of Ni(NO3)2Ni\left( NO_{3} \right)_{2} for ' xx ' seconds to coat the desired layer. The value of xx is _______(Nearest integer) ( ρNi\rho_{Ni} (density of Nickel) is 10gmL−110gmL^{- 1}, Molar mass of Nickel is 60gmol−1 F=96500Cmol−160gmol^{- 1}\text{ }F = 96500Cmol^{- 1} )