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Day 1: JEE Mains Chemistry

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

  1. Question 1

    Coordination Compounds. This type asked 19 times: 4 in 2021, 3 in 2022, 4 in 2023, 4 in 2024, 2 in 2025, 2 in 2026. This one: 4 Apr 2026 S1 See all 19 of this type

    37
    Match List-I with List-II
    List-I Complex ionList-II Calculated spin only magnetic moment (BM)
    (A)
    [Cr(H2O)6]2+\left\lbrack Cr\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    		(I)3.87
    (B)
    [Co(H2O)6]2+\left\lbrack Co\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    		(II)5.92
    (C)
    [Cu(H2O)6]2+\left\lbrack Cu\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    		(III)4.90
    (D)
    [Mn(H2O)6]2+\left\lbrack Mn\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    		(IV)1.73
    Choose the correct answer from the options given below:

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  2. Question 2

    Chemical Bonding and Molecular Structure. This type asked 15 times: 2021 Paper 11, 2021 Paper 12, 2021 Paper 13, 14 Jun 2022, 28 Jun 2022, 25 Jul 2022, 29 Jul 2022, 31 Jan 2024, 4 Apr 2024, 6 Apr 2024, 9 Apr 2024, 3 Apr 2025, 7 Apr 2025, 24 Jan 2026 S1, 5 Apr 2026 S1. This one: 5 Apr 2026 S1 See all 15 of this type

    46
    Consider the following species BrF5,XeF5−,BF4−,ICl4−,XeF4,SF4,NH4+,ClF3,XeF2,ICl2−{BrF}_{5},{XeF}_{5}^{-},{BF}_{4}^{-},{ICl}_{4}^{-},{XeF}_{4},{SF}_{4},{NH}_{4}^{+},{ClF}_{3},{XeF}_{2},{ICl}_{2}^{-}Number of species having sp  3 d\ ^{3}\text{ }d hybridized central atom is ____\_\_\_\_

  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. This type asked 15 times: 2021 Paper 22, 28 Jun 2022, 8 Apr 2023, 27 Jan 2024, 29 Jan 2024, 30 Jan 2024, 31 Jan 2024, 5 Apr 2024, 8 Apr 2024, 22 Jan 2025, 29 Jan 2025, 3 Apr 2025, 4 Apr 2025, 7 Apr 2025, 22 Jan 2026 S2. This one: 22 Jan 2026 S2 See all 15 of this type

    33
    The IUPAC name of the following compound is :

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  4. Question 4

    Some Basic Concepts of Chemistry. This type asked 14 times: 2021 Paper 21, 26 Jun 2022, 29 Jun 2022, 28 Jul 2022, 29 Jul 2022, 31 Jan 2023, 6 Apr 2023, 1 Feb 2024, 23 Jan 2025, 24 Jan 2025, 2 Apr 2025, 7 Apr 2025, 22 Jan 2026 S2, 28 Jan 2026 S2. This one: 28 Jan 2026 S2 See all 14 of this type

    43
    For the given reaction;
    CaCO3+2HCl→CaCl2+H2O+CO2CaCO_{3}+ 2HCl \rightarrow CaCl_{2}+H_{2}O +CO_{2}
    If 90 gCaCO390\text{ }gCaCO_{3} is added to 300 mL of HCl which contains 38.55%HCl38.55\% HCl by mass and has density 1.13 g mL−11.13\text{ }g{\text{ }mL}^{- 1}, then which of the following option is correct? Given molar mass of H,Cl,CaH,Cl,Ca and O are 1, 35.5, 40 and 16 g mol−116\text{ }g{\text{ }mol}^{- 1} respectively.

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  5. Question 5

    Chemical Bonding and Molecular Structure. This type asked 13 times: 2021 Paper 2, 2021 Paper 7, 2021 Paper 8, 27 Jun 2022, 26 Jul 2022, 31 Jan 2023, 11 Apr 2023, 30 Jan 2024, 6 Apr 2024, 8 Apr 2024, 28 Jan 2025, 28 Jan 2026 S2, 8 Apr 2026 S2. This one: 8 Apr 2026 S2 See all 13 of this type

    28
    Bromine trifluoride autoionizes to form BrF2⊕BrF_{2}^{\oplus} and BrF4⊖BrF_{4}^{\ominus}. The shapes of the cation and anion are respectively ____\_\_\_\_ , and ____\_\_\_\_ .

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