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Day 514: JEE Mains Chemistry

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

  1. Question 1

    Amines. Asked once: 6 Apr 2023

    40
    Compound PP is neutral. QQ gives effervescence with NaHCO3NaHCO_{3} while RR reacts with Hinsbergs reagent to give solid soluble in NaOHNaOH. Compound PP is

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  2. Question 2

    Chemical Bonding and Molecular Structure. Asked once: 2021 Paper 11

    31
    Which of these have different nature?

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  3. Question 3

    Chemical Kinetics. Asked once: 27 Jul 2022

    145
    A (reactant)→B (product)A\ (\text{reactant}) \rightarrow B\ (\text{product}). If formation of compound [B]\lbrack B\rbrack follows the first order of kinetics and after 70 minutes the concentration of [A] was found to be half of its initial concentration. Then the rate constant of the reaction is x×10−6 s−1x \times10^{- 6}{\text{ }s}^{- 1}. The value of xx is.........(Nearest Integer)

  4. Question 4

    Chemical Thermodynamics. Asked once: 6 Apr 2023

    53
    Consider the graph of Gibbs free energy G vs Extent of reaction. The number of statement/s from the following which are true with respect to points (a), (b) and (c) is A. Reaction is spontaneous at (a) and (b) B. Reaction is at equilibrium at point (b) and nonspontaneous at point (c) C. Reaction is spontaneous at (a) and nonspontaneous at (c) D. Reaction is non-spontaneous at (a) and (b)

  5. Question 5

    Classification of Elements and Periodicity. Asked once: 8 Apr 2023

    136
    Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is: (Given v=v = frequency of XX-ray emitted; Z=Z = atomic number ))

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