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Day 114: JEE Mains Chemistry

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

  1. Question 1

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 22 Jan 2026 S1 (same type asked 9 times) See all 9 of this type

    49
    Sodium fusion extract of an organic compound (Y) with CHCl3{CHCl}_{3} and chlorine water gives violet color to the CHCl3{CHCl}_{3} layer. 0.15 g of (Y)(Y) gave 0.12 g of the silver halide precipitate in Carius method. Percentage of halogen in the compound (Y)(Y) is ____\_\_\_\_ . (Nearest integer). (Given : molar mass gmol−1C:12,H:1,Cl:35.5g{mol}^{- 1}C:12,H:1,Cl:35.5, Br: 80, I : 127)

  2. Question 2

    Coordination Compounds. Asked once: 4 Apr 2025 (same type asked 9 times) See all 9 of this type

    31
    Which one of the following complexes will have Δ0=0\Delta_{0}= 0 and μ=5.96\mu= 5.96 B.M.?

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  3. Question 3

    Chemical Bonding and Molecular Structure. Asked once: 28 Jan 2025 (same type asked 9 times) See all 9 of this type

    125
    Total number of molecules/species from following which will be paramagnetic is ___\_\_\_ O2,O2+,O2−,NO,NO2,CO,K2[NiCl4]O_{2},O_{2}^{+},O_{2}^{-},NO,NO_{2},CO,K_{2}\left\lbrack NiCl_{4} \right\rbrack,
    [Co(NH3)6]Cl3, K2[Ni(CN)4]\left\lbrack Co\left( NH_{3} \right)_{6} \right\rbrack Cl_{3},{\text{ }K}_{2}\left\lbrack Ni(CN)_{4} \right\rbrack

  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 29 Jan 2023 (same type asked 9 times) See all 9 of this type

    121
    According to MOMO theory the bond orders for O2 2−,COO_{2}\ ^{2 -},CO and NO+NO^{+}respectively, are

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  5. Question 5

    Some Basic Concepts of Chemistry. Asked once: 30 Jan 2024 (same type asked 9 times) See all 9 of this type

    60
    The mass of sodium acetate (CH3COONa)\left( CH_{3}COONa \right) required to prepare 250 mL250\text{ }mL of 0.35M0.35M aqueous solution is _____ g. (Molar mass of CH3COONaCH_{3}COONa is 82.02 g mol−182.02\text{ }g{\text{ }mol}^{- 1} )