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Day 278: JEE Mains Chemistry

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

  1. Question 1

    Some Basic Concepts of Chemistry. Asked once: 4 Apr 2026 S1 (same type asked 10 times) See all 10 of this type

    26
    Number of moles and number of molecules in 1.4187 L of SO2SO_{2} at STP respectively are

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  2. Question 2

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 3 Apr 2025 (same type asked 10 times) See all 10 of this type

    47
    0.5 g of an organic compound on combustion gave 1.46 g of CO2{CO}_{2} and 0.9 g of H2OH_{2}O. The percentage of carbon in the compound is ____ . (Nearest integer) [Given : Molar mass (in gmol−1g{mol}^{- 1} ) C:12,H:1C:12,H:1, O : 16]

  3. Question 3

    Coordination Compounds. Asked once: 27 Jan 2024 (same type asked 10 times) See all 10 of this type

    38
    Consider the following complex ions
    P=[FeF6]3−P =\left\lbrack FeF_{6} \right\rbrack^{3 -}
    Q=[V(H2O)6]2+Q =\left\lbrack V\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    R=[Fe(H2O)6]2+R =\left\lbrack Fe\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    The correct order of the complex ions, according to their spin only magnetic moment values (in B.M.) is:

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  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 8 Apr 2023 (same type asked 10 times) See all 10 of this type

    145
    The number of species from the following carrying a single lone pair on central atom Xenon is_____ XeF5+,XeO3,XeO2 F2,XeF5−,XeO3 F2,XeOF4XeF_{5}^{+},XeO_{3},XeO_{2}{\text{ }F}_{2},XeF_{5}^{-},XeO_{3}{\text{ }F}_{2},XeOF_{4}, XeF4XeF_{4}

  5. Question 5

    Amines. Asked once: 9 Apr 2024 (same type asked 9 times) See all 9 of this type

    34
    Correct order of basic strength of Pyrrole, Pyridine and Piperidine is

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