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Day 57: JEE Mains Chemistry

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

  1. Question 1

    Hydrocarbons. This type asked 3 times: 26 Jun 2022, 29 Jan 2025, 22 Jan 2026 S1. This one: 22 Jan 2026 S1 See all 3 of this type

    36
    Given below are two statements : Statement I : Benzene is nitrated to give nitrobenzene, which on further treatment with CH3COCl/AlCl3{CH}_{3}COCl/{AlCl}_{3} will give m-nitroacetophenone (shown below). Statement II : NO2{NO}_{2} group is a mm-directing, and deactivating group. In the light of the above statements, choose the most appropriate answer from the options given below.

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  2. Question 2

    Chemical Thermodynamics. This type asked 3 times: 2021 Paper 26, 28 Jan 2025, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 3 of this type

    31
    Consider the following data: ΔfHΘ(\Delta_{f}H^{\Theta}( methane, g)=−XkJmol−1) = - XkJmol^{- 1} Enthalpy of sublimation of graphite =YkJmol−1= YkJmol^{- 1} Dissociation enthalpy of H2=ZkJmol−1H_{2}= ZkJmol^{- 1} The bond enthalpy of C−HC - H bond is given by:

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  3. Question 3

    Electrochemistry. This type asked 3 times: 29 Jan 2023, 31 Jan 2023, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 3 of this type

    50
    MX is a sparingly soluble salt that follows the given solubility equilibrium at 298 K
    MX(s)⇌M+(aq)+X−(aq);Ksp=10−10MX(s) \rightleftharpoons M^{+}(aq) + X^{-}(aq);K_{sp} = 10^{- 10}
    If the standard reduction potential for M+(aq)→+e− M(s)M^{+}(aq)\overset{+ e^{-}\ }{\rightarrow}M(s) is (EM+/M⊖)=0.79 V\left( E_{M^{+}/M}^{\ominus} \right) = 0.79\text{ }V, then the value of the standard reduction potential for the metal/metal insoluble salt electrode EX−/MX(s)/M⊖E_{X^{-}/MX(s)/M}^{\ominus} is ____\_\_\_\_ mV. (nearest integer) [Given: 2.303RTF=0.059 V\frac{2.303RT}{F} = 0.059\text{ }V ]

  4. Question 4

    The d- and f-Block Elements. This type asked 3 times: 27 Jul 2022, 1 Feb 2023, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 3 of this type

    41
    Given below are some of the statements about Mn and Mn2O7Mn_{2}O_{7}. Identify the correct statements (A) Mn forms the oxide Mn2O7{Mn}_{2}O_{7} in which Mn is in its highest oxidation state. (B) Oxygen stabilizes the Mn in higher oxidation states by forming multiple bonds with Mn (C) Mn2O7{Mn}_{2}O_{7} is an ionic oxide. (D) The structure of Mn2O7{Mn}_{2}O_{7} consists of one bridged oxygen. Choose the correct answer from the options given below:

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  5. Question 5

    The p-Block Elements. This type asked 3 times: 2021 Paper 4, 29 Jan 2023, 21 Jan 2026 S2. This one: 21 Jan 2026 S2 See all 3 of this type

    44
    Given below are two statements : Statement I : The correct order in terms of bond dissociation enthalpy is Cl2>Br2>F2>I2{Cl}_{2} > {Br}_{2} > F_{2} > I_{2} Statement II : The correct trend in the covalent character of the metal halides is [SnCl4>SnCl2]\left\lbrack {SnCl}_{4} > {SnCl}_{2} \right\rbrack, [PbCl4>PbCl2]\left\lbrack {PbCl}_{4} > {PbCl}_{2} \right\rbrack and [UF4>UF6]\left\lbrack {UF}_{4} > {UF}_{6} \right\rbrack In the light of the above statements, choose the correct answer from the options given below :

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