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Day 265: JEE Mains Chemistry

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

  1. Question 1

    Equilibrium. Asked once: 30 Jan 2023 (same type asked 3 times) See all 3 of this type

    148
    Consider the following equation:
    2SO2(g)+O2(g)⇌2SO3(g),ΔH=−190 kJ2SO_{2}(g) +O_{2}(g) \rightleftharpoons 2SO_{3}(g),\Delta H = - 190\text{ }kJ
    The number of factors which will increase the yield of SO3SO_{3} at equilibrium from the following is A. Increasing temperature B. Increasing pressure C. Adding more SO2SO_{2} D. Adding more O2O_{2} E. Addition of catalyst

  2. Question 2

    Structure of Atom. Asked once: 6 Apr 2023 (same type asked 3 times) See all 3 of this type

    140
    If the radius of the first orbit of hydrogen atom a0a_{0}, then de Broglie's wavelength of electron in 3rd 3^{\text{rd~}} orbit is

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  3. Question 3

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 2021 Paper 3 (same type asked 3 times) See all 3 of this type

    49
    Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are: A == 2,4,6-triaminophenol, B == benzoic acid, C == 2,4,6-trinitrophenol (picric acid).

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  4. Question 4

    Some Basic Concepts of Chemistry. Asked once: 6 Apr 2023 (same type asked 3 times) See all 3 of this type

    45
    Which of the following options are correct for the reaction?
    2[Au(CN)2](aq)−+Zn(s)→2Au(s)+[Zn(CN)4]2− (aq)2\left\lbrack Au(CN)_{2} \right\rbrack_{(aq)}^{-}+ Zn(s) \rightarrow 2Au(s) +\left\lbrack Zn(CN)_{4} \right\rbrack^{2 -}\ _{(aq)}
    A. Redox reaction B. Displacement reaction C. Decomposition reaction D. Combination reaction Choose the correct answer from the options given below:

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  5. Question 5

    Structure of Atom. Asked once: 30 Jan 2024 (same type asked 3 times) See all 3 of this type

    38
    Given below are two statements: Statement-I: The orbitals having same energy are called as degenerate orbitals. Statement-II: In hydrogen atom, 3p3p and 3 d3\text{ }d orbitals are not degenerate orbitals. In the light of the above statements, choose the most appropriate answer from the options given

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