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Day 319: JEE Mains Chemistry

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

  1. Question 1

    Coordination Compounds. Asked once: 28 Jan 2025 (same type asked 12 times) See all 12 of this type

    111
    Match List-I with List-II.
    List-I (Complex)List-II (Hybridisation of central metal ion)
    (A)[CoF6]3−\left\lbrack CoF_{6} \right\rbrack^{3 -}(I) d2sp3d^{2}sp^{3}
    (B)[NiCl4]2−\left\lbrack NiCl_{4} \right\rbrack^{2 -}(II) sp3sp^{3}
    (C)[Co(NH3)6]3+\left\lbrack Co\left( NH_{3} \right)_{6} \right\rbrack^{3 +}(III) sp3 d2sp^{3}\text{ }d^{2}
    (D)[Ni(CN)4]2−\left\lbrack Ni(CN)_{4} \right\rbrack^{2 -}(IV) dsp2dsp^{2}
    Choose the correct answer from the options given below :

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  2. Question 2

    Hydrocarbons. Asked once: 27 Jan 2024 (same type asked 11 times) See all 11 of this type

    56
    Among the given organic compounds, the total number of aromatic compounds is

  3. Question 3

    Some Basic Concepts of Chemistry. Asked once: 13 Apr 2023 (same type asked 11 times) See all 11 of this type

    56
    20 mL20\text{ }mL of calcium hydroxide was consumed when it was reacted with 10 mL10\text{ }mL of unknown solution of H2SO4H_{2}SO_{4}.Also 20 mL20\text{ }mL standard solution of 0.5M0.5M HClHCl containing 2 drops of phenolphthalein was titrated with calcium hydroxide the mixture showed pink colour when burette displayed the value of 35.5 mL35.5\text{ }mL whereas the burette showed 25.5 mLmL initially. The concentration of H2SO4H_{2}SO_{4} is_________ M (Nearest integer)

  4. Question 4

    Coordination Compounds. Asked once: 3 Apr 2025 (same type asked 10 times) See all 10 of this type

    110
    Identify the diamagnetic octahedral complex ions from below ; A. [Mn(CN)6]3−\left\lbrack Mn(CN)_{6} \right\rbrack^{3 -} B. [Co(NH3)6]3+\left\lbrack Co\left( {NH}_{3} \right)_{6} \right\rbrack^{3 +} C. [Fe(CN)6]4−\left\lbrack Fe(CN)_{6} \right\rbrack^{4 -} D. [Co(H2O)3 F3]\left\lbrack Co\left( H_{2}O \right)_{3}{\text{ }F}_{3} \right\rbrack Choose the correct answer from the options given below :

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  5. Question 5

    Some Basic Concepts of Chemistry. Asked once: 3 Apr 2025 (same type asked 10 times) See all 10 of this type

    33
    Among 10−9 g10^{- 9}\text{ }g (each) of the following elements, which one will have the highest number of atoms? Element: Pb,Po,PrPb,Po,Pr and Pt

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