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Day 8: JEE Mains Chemistry

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

  1. Question 1

    The p-Block Elements. This type asked 7 times: 2021 Paper 5, 2021 Paper 13, 30 Jan 2024, 1 Feb 2024, 28 Jan 2025, 28 Jan 2026 S1, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 7 of this type

    34
    Find the correct statements related to group 15 hydrides. (A) Reducing nature increases from NH3{NH}_{3} to BiH3{BiH}_{3} (B) Tendency to donate lone pair of electrons decreases from NH3{NH}_{3} to BiH3{BiH}_{3} (C) The stability of hydrides decreases from NH3{NH}_{3} to BiH3{BiH}_{3} (D) HEH bond angle decreases from NH3{NH}_{3} to SbH3{SbH}_{3} ( E=E = Elements of group 15) Choose the correct answer from the options given below :

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  2. Question 2

    Structure of Atom. This type asked 7 times: 26 Jun 2022, 25 Jan 2023, 29 Jan 2023, 22 Jan 2025, 2 Apr 2025, 4 Apr 2026 S2, 6 Apr 2026 S2. This one: 6 Apr 2026 S2 See all 7 of this type

    27
    The Bohr radius of a hydrogen like species is 70.53 pm . The species and the stationary state(n) are respectively (Given: Hydrogen atom Bohr radius is 52.9 pm )

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  3. Question 3

    Chemical Kinetics. This type asked 7 times: 26 Jul 2022, 25 Jan 2023, 30 Jan 2023, 31 Jan 2024, 29 Jan 2025, 5 Apr 2026 S1, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 7 of this type

    49
    Sucrose hydrolyses in acidic medium into glucose and fructose by first order rate law with t1/2=3t_{1/2} = 3 hour. The percentage of sucrose remaining after 6 hours is ____\_\_\_\_ . (Nearest integer) (Given : log⁡2=0.3010\log2 = 0.3010 and log⁡3=0.4771\log3 = 0.4771 )

  4. Question 4

    Solutions. This type asked 7 times: 27 Jul 2022, 6 Apr 2023, 11 Apr 2023, 12 Apr 2023, 15 Apr 2023, 23 Jan 2025, 6 Apr 2026 S1. This one: 6 Apr 2026 S1 See all 7 of this type

    31
    When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was x%x\% of vapor pressure of pure solvent. What is the value of x%x\%?

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  5. Question 5

    Equilibrium. This type asked 7 times: 14 Jun 2022, 31 Jan 2024, 23 Jan 2025, 29 Jan 2025, 2 Apr 2025, 23 Jan 2026 S1, 5 Apr 2026 S2. This one: 5 Apr 2026 S2 See all 7 of this type

    31
    The reaction A(g)⇌B(g)+C(g)A(g) \rightleftharpoons B(g) + C(g) was initiated with the amount ' a ' of A(g)A(g). At equilibrium it is found that the amount of A(g)A(g) remaining is (a−x)(a - x) at a total pressure of p. The equilibrium constant KpK_{p} of the reaction can be calculated from the expression :

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