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Day 211: JEE Mains Chemistry

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

  1. Question 1

    Coordination Compounds. Asked once: 23 Jan 2025 (same type asked 9 times) See all 9 of this type

    35
    The d-electronic configuration of an octahedral Co (II) complex having magnetic moment of 3.95 BM is :

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  2. Question 2

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

    123
    A metal complex with a formula MCl4⋅3NH3{MCl}_{4} \cdot 3{NH}_{3} is involved in sp3 d2{sp}^{3}{\text{ }d}^{2} hybridisation. It upon reaction with excess of AgNO3{AgNO}_{3} solution gives ' x ' moles of AgCl . Consider ' x ' is equal to the number of lone pairs of electron present in central atom of BrF5{BrF}_{5}. Then the number of geometrical isomers exhibited by the complex is ____ .

  3. Question 3

    Organic Chemistry - Some Basic Principles and Techniques. Asked once: 24 Jan 2025 (same type asked 9 times) See all 9 of this type

    125
    In Carius method of estimation of halogen, 0.25 g of an organic compound gave 0.15 g of silver bromide (AgBr)(AgBr). The percentage of Bromine in the organic compound is ______\_\_\_\_\_\_ × 10−1%\times \ 10^{- 1}\% (Nearest integer). (Given : Molar mass of Ag is 108 and Br is 80 g mol−180\text{ }g{\text{ }mol}^{- 1} )

  4. Question 4

    Coordination Compounds. Asked once: 2 Apr 2025 (same type asked 9 times) See all 9 of this type

    102
    The d-orbital electronic configuration of the complex among [Co(en)3]3+, [CoF6]3−\left\lbrack Co(en)_{3} \right\rbrack^{3 +},\ \left\lbrack CoF_{6} \right\rbrack^{3 -}, [Mn(H2O)6]2+\left\lbrack Mn\left( H_{2}O \right)_{6} \right\rbrack^{2 +} and [Zn(H2O)6]2+\left\lbrack Zn\left( H_{2}O \right)_{6} \right\rbrack^{2 +} that has the highest CFSE is :

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  5. Question 5

    Chemical Bonding and Molecular Structure. Asked once: 9 Apr 2024 (same type asked 9 times) See all 9 of this type

    57
    The total number of species from the following in which one unpaired electron is present, is ____.
    N2,O2,C2−,O2−,O22−,H2+,CN−,He2+N_{2},O_{2},C_{2}^{-},O_{2}^{-},O_{2}^{2 -},H_{2}^{+},CN^{-},He_{2}^{+}