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Day 37: JEE Mains Chemistry

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

  1. Question 1

    Solutions. This type asked 4 times: 10 Apr 2023, 24 Jan 2025, 29 Jan 2025, 7 Apr 2025. This one: 7 Apr 2025 See all 4 of this type

    49
    The percentage dissociation of a salt (MX3)\left( {MX}_{3} \right) solution at given temperature (van't Hoff factor i = 2) is ____ % (Nearest integer)

  2. Question 2

    Some Basic Concepts of Chemistry. This type asked 4 times: 26 Jul 2022, 29 Jul 2022, 31 Jan 2023, 7 Apr 2025. This one: 7 Apr 2025 See all 4 of this type

    34
    At the sea level, the dry air mass percentage composition is given as nitrogen gas : 70.0, oxygen gas : 27.0 and argon gas : 3.0. If total pressure is 1.15 atm , then calculate the ratio of followings respectively : (i) partial pressure of nitrogen gas to partial pressure of oxygen gas (ii) partial pressure of oxygen gas to partial pressure of argon gas (Given : Molar mass of N, O and Ar are 14, 16, and 40 g mol−140\text{ }g{\text{ }mol}^{- 1} respectively)

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  3. Question 3

    Alcohols, Phenols and Ethers. This type asked 4 times: 26 Jul 2022, 25 Jan 2023, 23 Jan 2025, 4 Apr 2025. This one: 4 Apr 2025 See all 4 of this type

    38
    Benzene is treated with oleum to produce compound (X) which when further heated with molten sodium hydroxide followed by acidification produces compound (Y). The compound Y is treated with zinc metal to produce compound (Z). Identify the structure of compound (Z) from the following option.

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  4. Question 4

    Amines. This type asked 4 times: 29 Jan 2024, 24 Jan 2025, 3 Apr 2025, 4 Apr 2025. This one: 4 Apr 2025 See all 4 of this type

    35
    The major product (A) formed in the following reaction sequence is.

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  5. Question 5

    Chemical Thermodynamics. This type asked 4 times: 24 Jan 2023, 23 Jan 2025, 24 Jan 2025, 4 Apr 2025. This one: 4 Apr 2025 See all 4 of this type

    27
    Let us consider a reversible reaction at temperature, T . In this reaction, both ΔH\Delta H and ΔS\Delta S were observed to have positive values. If the equilibrium temperature is Te , then the reaction becomes spontaneous at :

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