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Day 484: JEE Mains Chemistry

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

  1. Question 1

    Chemical Thermodynamics. Asked once: 5 Apr 2024

    34
    Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): Enthalpy of neutralization of strong monobasic acid with strong monoacidic base is always −57 kJ mol−1- 57\text{ }kJ{\text{ }mol}^{- 1} Reason (R): Enthalpy of neutralization is the amount of heat liberated when one mole of H+H^{+}ions furnished by acid combine with one mole of  −OH\ ^{-}OH ions furnished by base to form one mole of water. In the light of the above statements, choose the correct answer from the options given below.

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  2. Question 2

    Classification of Elements and Periodicity. Asked once: 31 Jan 2024

    140
    Consider the following elements. Which of the following is/are true about A′,B′,CA^{'},B^{'},C ' and D′D^{'} ? (A) Order of atomic radii: B′<A′<D′<C′B^{'}<A^{'}<D^{'}<C^{'} (B) Order of metallic character: B′<A′<D′<C′B^{'}<A^{'}<D^{'}<C^{'} (C) Size of the element: D′<C′<B′<A′D^{'}<C^{'}<B^{'}<A^{'} (D) Order of ionic radii: B′+<A′+<D′+<C′+B^{' +}<A^{' +}<D^{' +}<C^{' +} Choose the correct answer from the options given below:

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  3. Question 3

    Electrochemistry. Asked once: 8 Apr 2023

    149
    The number of incorrect statements from the following is___ (A) The electrical work that a reaction can perform at constant pressure and temperature is equal to the reaction Gibbs energy. (B) Ecell 0E_{\text{cell~}}^{0} is dependent on the pressure (C) dE0 cell dT=ΔrS0nF\frac{dE^{0}\text{~cell~}}{dT}=\frac{\Delta_{r}S^{0}}{nF} (D) A cell is operating reversibly if the cell potential is exactly balanced by an opposing source of potential difference.

  4. Question 4

    Equilibrium. Asked once: 2021 Paper 3

    50
    The solubility of AgCNAgCN in a buffer solution of pH=3pH = 3 is xx. The value of xx is: [Assume: No cyano complex is formed; Ksp(AgCN)=2.2×10−16K_{sp}(AgCN) = 2.2 \times10^{- 16} and Ka(HCN)=6.2×10−10K_{a}(HCN) = 6.2 \times10^{- 10} ]

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  5. Question 5

    Haloalkanes and Haloarenes. Asked once: 31 Jan 2024

    38
    The product (C)(C) in the below mentioned reaction is:

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