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Day 62: JEE Mains Chemistry

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

  1. Question 1

    Electrochemistry. This type asked 3 times: 28 Jul 2022, 9 Apr 2024, 29 Jan 2025. This one: 29 Jan 2025 See all 3 of this type

    110
    Match List-I with List-II :
    List-I (Application)List-II (Battery/Cell)
    (A)Transistors(I)Anode -Zn/Hg; Cathode -HgO + C
    (B)Hearing aids(II)Hydrogen fuel cell
    (C)Invertors(III)Anode - Zn ; Cathode - Carbon
    (D)Apollo space ship(IV)Anode - Pb ; Cathode - PbO2PbO_{2} on a lead grid
    Choose the correct answer from the options given below :

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  2. Question 2

    Equilibrium. This type asked 3 times: 30 Jan 2023, 5 Apr 2024, 29 Jan 2025. This one: 29 Jan 2025 See all 3 of this type

    106
    Consider the equilibrium
    CO( g)+3H2( g)⇌CH4( g)+H2O( g)CO(\text{ }g) + 3H_{2}(\text{ }g) \rightleftharpoons CH_{4}(\text{ }g) +H_{2}O(\text{ }g)
    If the pressure applied over the system increases by two fold at constant temperature then (A) Concentration of reactants and products increases. (B) Equilibrium will shift in forward direction. (C) Equilibrium constant increases since concentration of products increases. (D) Equilibrium constant remains unchanged as concentration of reactants and products remain same. Choose the correct answer from the options given below :

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  3. Question 3

    Structure of Atom. This type asked 3 times: 6 Apr 2023, 4 Apr 2024, 29 Jan 2025. This one: 29 Jan 2025 See all 3 of this type

    40
    If a0a_{0} is denoted as the Bohr radius of hydrogen atom, then what is the de-Broglie wavelength ( λ\lambda ) of the electron present in the second orbit of hydrogen atom? [ n : any integer]

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  4. Question 4

    Aldehydes, Ketones and Carboxylic Acids. This type asked 3 times: 2021 Paper 3, 2021 Paper 14, 28 Jan 2025. This one: 28 Jan 2025 See all 3 of this type

    43
    The compounds that produce CO2CO_{2} with aqueous NaHCO3NaHCO_{3} solution are : (A) (B) (C) (D) (E) Choose the correct answer from the options given below :

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  5. Question 5

    Some Basic Concepts of Chemistry. This type asked 3 times: 6 Apr 2023, 6 Apr 2024, 28 Jan 2025. This one: 28 Jan 2025 See all 3 of this type

    28
    Match List-I with List-II.
    List-I (Redox reaction)List-II (Type of redox reaction)
    (A)CH4(g)+2O2(g)→ΔCO2(g)+2H2O(l)CH_{4}(g) + 2O_{2}(g) \overset{\Delta}{\rightarrow} CO_{2}(g) + 2H_{2}O(l)(I)Disproportionation reaction
    (B)2NaH(s)→Δ2Na(s)+H2(g)2NaH(s) \overset{\Delta}{\rightarrow} 2Na(s) + H_{2}(g)(II)Combination reaction
    (C)V2O5(s)+5Ca(s)→Δ2V(s)+5CaO(s)V_{2}O_{5}(s) + 5Ca(s) \overset{\Delta}{\rightarrow} 2V(s) + 5CaO(s)(III)Decomposition reaction
    (D)2H2O2(aq)→Δ2H2O(l)+O2(g)2H_{2}O_{2}(aq) \overset{\Delta}{\rightarrow} 2H_{2}O(l) + O_{2}(g)(IV)Displacement reaction
    Choose the correct answer from the options given below :

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