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Day 346: JEE Mains Chemistry

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

  1. Question 1

    Coordination Compounds. Asked once: 10 Apr 2023 (same type asked 10 times) See all 10 of this type

    133
    The correct order of the number of unpaired electrons in the given complexes is A. [Fe(CN)6]3−\left\lbrack Fe(CN)_{6} \right\rbrack^{3 -} B. [FeF6]3−\left\lbrack FeF_{6} \right\rbrack^{3 -} C. [CoF6]3−\left\lbrack CoF_{6} \right\rbrack^{3 -} D. [Cr( oxalate )3]3−\left\lbrack Cr(\text{~oxalate~})_{3} \right\rbrack^{3 -} E. [Ni(CO)4]\left\lbrack Ni(CO)_{4} \right\rbrack Choose the correct answer from the options given below:

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  2. Question 2

    Chemical Bonding and Molecular Structure. Asked once: 25 Jul 2022 (same type asked 10 times) See all 10 of this type

    146
    The sum of number of lone pairs of electrons present on the central atoms of XeO3,XeOF4XeO_{3},XeOF_{4} and XeF6XeF_{6} is

  3. Question 3

    Amines. Asked once: 29 Jul 2022 (same type asked 9 times) See all 9 of this type

    42
    Which among the following is the strongest Bronsted base?

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  4. Question 4

    Coordination Compounds. Asked once: 6 Apr 2024 (same type asked 9 times) See all 9 of this type

    42
    Consider the following complexes. [CoCl(NH3)5]2+,        [Co(CN)6]3−\left\lbrack CoCl\left( NH_{3} \right)_{5} \right\rbrack^{2 +},\ \ \ \ \ \ \ \ \left\lbrack Co(CN)_{6} \right\rbrack^{3 -}, (A) (B)
    [Co(NH3)5(H2O)]3+, [Cu(H2O)4]2+\left\lbrack Co\left( NH_{3} \right)_{5}\left( H_{2}O \right) \right\rbrack^{3 +},\ \left\lbrack Cu\left( H_{2}O \right)_{4} \right\rbrack^{2 +}
    (C) (D) The correct order of A,B,CA,B,C and DD in terms of wavenumber of light absorbed is:

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  5. Question 5

    Coordination Compounds. Asked once: 31 Jan 2024 (same type asked 9 times) See all 9 of this type

    121
    Match List I with List II
    List I (Complex ion)List II (Electronic configuration)
    A.
    [Cr(H2O)6]3+\left\lbrack Cr\left( H_{2}O \right)_{6} \right\rbrack^{3 +}
    		I.
    t2g2eg0t_{2g}^{2}e_{g}^{0}
    B.
    [Fe(H2O)6]3+\left\lbrack Fe\left( H_{2}O \right)_{6} \right\rbrack^{3 +}
    		II.
    t2g3eg0t_{2g}^{3}e_{g}^{0}
    C.
    [Ni(H2O)6]2+\left\lbrack Ni\left( H_{2}O \right)_{6} \right\rbrack^{2 +}
    		III.
    t2g3eg2t_{2g}^{3}e_{g}^{2}
    D.
    [V(H2O)6]3+\left\lbrack V\left( H_{2}O \right)_{6} \right\rbrack^{3 +}
    		IV.
    t2g6eg2t_{2g}^{6}e_{g}^{2}
    Choose the correct answer from the options given below:

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