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Day 38: JEE Mains Chemistry

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

  1. Question 1

    Equilibrium. This type asked 4 times: 2021 Paper 15, 27 Jun 2022, 29 Jan 2023, 4 Apr 2025. This one: 4 Apr 2025 See all 4 of this type

    125
    x mgx\ mg of Mg(OH)2Mg(OH)_{2} (molar mass =58= 58 ) is required to be dissolved in 1.0 L of water to produce a pH of 10.0 at 298 K . The value of xx is ____\_\_\_\_ mg. (Nearest integer) (Given : Mg(OH)2Mg(OH)_{2} is assumed to dissociate completely in H2OH_{2}O )

  2. Question 2

    Biomolecules. This type asked 4 times: 2021 Paper 5, 26 Jun 2022, 31 Jan 2024, 3 Apr 2025. This one: 3 Apr 2025 See all 4 of this type

    103
    Fat soluble vitamins are : A. Vitamin B1B_{1} B. Vitamin C C. Vitamin E D. Vitamin B12B_{12} E. Vitamin K Choose the correct answer from the options given below:

    Tap an option to check your answer.

  3. Question 3

    Chemical Thermodynamics. This type asked 4 times: 26 Jul 2022, 27 Jul 2022, 1 Feb 2023, 3 Apr 2025. This one: 3 Apr 2025 See all 4 of this type

    123
    A sample of n-octane (1.14 g)(1.14\text{ }g) was completely burnt in excess of oxygen in a bomb calorimeter, whose heat capacity is 5 kJ K−15\text{ }kJ{\text{ }K}^{- 1}. As a result of combustion reaction, the temperature of the calorimeter is increased by 5 K . The magnitude of the heat of combustion of octane at constant volume is ____ kJmol−1kJ{mol}^{- 1} (nearest integer).

  4. Question 4

    Coordination Compounds. This type asked 4 times: 2021 Paper 21, 29 Jan 2023, 30 Jan 2024, 3 Apr 2025. This one: 3 Apr 2025 See all 4 of this type

    48
    The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is  FeCl3+KOH+H2C2O4→ A\ {FeCl}_{3} + KOH + H_{2}C_{2}O_{4} \rightarrow \text{ }A

  5. Question 5

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 4 times: 28 Jul 2022, 30 Jan 2023, 29 Jan 2024, 3 Apr 2025. This one: 3 Apr 2025 See all 4 of this type

    44
    The least acidic compound, among the following is:

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