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Day 322: JEE Mains Chemistry

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

  1. Question 1

    Chemical Bonding and Molecular Structure. Asked once: 2021 Paper 26 (same type asked 9 times) See all 9 of this type

    46
    Match List-I with List-II. List-I List-II (Molecule) (Bond order) (A) Ne2Ne_{2} (i) 1 (B) N2N_{2} (ii) 2 (C) F2F_{2} (iii) 0 (D) O2O_{2} (iv) 3 Choose the correct answer from the options given below:

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  2. Question 2

    Some Basic Concepts of Chemistry. Asked once: 2021 Paper 24 (same type asked 9 times) See all 9 of this type

    56
    If 80 g80\text{ }g of copper sulphate CuSO4⋅5H2OCuSO_{4}\cdot 5H_{2}O is dissolved in deionised water to make 5 L5\text{ }L of solution. The concentration of the copper sulphate solution is x×10−3 mol L−1x \times 10^{- 3}\text{ }mol{\text{ }L}^{- 1}. The value of xx is [Atomic masses Cu: 63.54u,S:32u,O:16u,H:1u63.54u,S:32u,O:16u,H:1u ]

  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 6 Apr 2024 (same type asked 8 times) See all 8 of this type

    34
    Which of the following is metamer of the given compound (X)?

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  4. Question 4

    Structure of Atom. Asked once: 21 Jan 2026 S2 (same type asked 8 times) See all 8 of this type

    26
    Consider the following spectral lines for atomic hydrogen: (A) First line of Paschen series (B) Second line of Balmer series (C) Third line of Paschen series (D) Fourth line of Brackett series The correct arrangement of the above lines in ascending order of energy is:

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  5. Question 5

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 29 Jan 2025 (same type asked 8 times) See all 8 of this type

    124
    In the sulphur estimation, 0.20 g of a pure organic compound gave 0.40 g of barium sulphate. The percentage of sulphur in the compound is _____\_\_\_\_\_ ×10−1\times10^{- 1} %\%. (Molar mass : O=16, S=32,Ba=137ingmol −1O = 16,\text{ }S = 32,Ba = 137in_{gmol}\ ^{- 1} )