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Day 194: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. Asked once: 9 Apr 2024 (same type asked 2 times) See all 2 of this type

    144
    Consider the following test for a group-IV cation. M2++H2 S→AM^{2 +}+H_{2}\text{ }S \rightarrow A (Black precipitate) + byproduct A+A + aqua regia →B+NOCl+S+H2O\rightarrow B + NOCl + S +H_{2}O B+KNO2+CH3COOH→C+B +KNO_{2}+CH_{3}COOH \rightarrow C + byproduct The spin only magnetic moment value of the metal complex C is _____ BM. (Nearest integer)

  2. Question 2

    Structure of Atom. Asked once: 24 Jan 2023 (same type asked 2 times) See all 2 of this type

    41
    It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power " nn " i.e. vnv^{n} of XX-rays emitted is plotted against atomic number " Z ", following graph is obtained. The value of " nn " is

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  3. Question 3

    The d- and f-Block Elements. Asked once: 2021 Paper 24 (same type asked 2 times) See all 2 of this type

    41
    In the given chemical reaction, colors of the Fe2+Fe^{2 +} and Fe3+Fe^{3 +} ions, are respectively:
    5Fe2++MnO4−+8H+→Mn2++4H2O+5Fe3+5Fe^{2 +}+MnO_{4}^{-}+ 8H^{+}\rightarrow Mn^{2 +}+ 4H_{2}O + 5Fe^{3 +}

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  4. Question 4

    Amines. Asked once: 2021 Paper 22 (same type asked 2 times) See all 2 of this type

    54
    The total number of reagents from those given below, that can convert nitrobenzene into aniline is . (Integer answer) I. Sn−HClSn - HCl II. Sn−NH4OHSn - {NH}_{4}OH III. Fe−HClFe - HCl IV. Zn−HClZn - HCl V. H2−PdH_{2} - Pd VI. H2H_{2} - Raney Nickel

  5. Question 5

    Electrochemistry. Asked once: 27 Jan 2024 (same type asked 2 times) See all 2 of this type

    123
    Which of the following statements is not correct about rusting of iron?

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