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Day 23: JEE Mains Chemistry

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

  1. Question 1

    The d- and f-Block Elements. This type asked 5 times: 14 Jun 2022, 29 Jun 2022, 28 Jul 2022, 4 Apr 2024, 21 Jan 2026 S1. This one: 21 Jan 2026 S1 See all 5 of this type

    38
    MnO42−MnO_{4}^{2 -}, in acidic medium, disproportionates to :

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  2. Question 2

    Coordination Compounds. This type asked 5 times: 2021 Paper 14, 2021 Paper 17, 27 Jul 2022, 24 Jan 2023, 7 Apr 2025. This one: 7 Apr 2025 See all 5 of this type

    111
    Match List-I with List-II
    List-I ComplexList-II Primary valencyvalency and Secondary
    (A)
    [Co(en)2Cl2]Cl\left\lbrack Co(en)_{2}{Cl}_{2} \right\rbrack Cl
    		(I)36
    (B)
    [Pt(NH3)2Cl(NO2)]\left\lbrack Pt\left( {NH}_{3} \right)_{2}Cl\left( {NO}_{2} \right) \right\rbrack
    		(II)34
    (C)
    Hg[Co(SCN)4]Hg\left\lbrack Co(SCN)_{4} \right\rbrack
    		(III)26
    (D)
    [Mg( EDTA )]2−\lbrack Mg(\text{~EDTA~})\rbrack^{2 -}
    		(IV)24
    Choose the correct answer from the options given below:

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  3. Question 3

    The d- and f-Block Elements. This type asked 5 times: 29 Jul 2022, 6 Apr 2023, 10 Apr 2023, 15 Apr 2023, 4 Apr 2025. This one: 4 Apr 2025 See all 5 of this type

    47
    KMnO4{KMnO}_{4} acts as an oxidising agent in acidic medium. ' X ' is the difference between the oxidation states of Mn in reactant and product. ' Y ' is the number of ' dd ' electrons present in the brown red precipitate formed at the end of the acetate ion test with neutral ferric chloride. The value of X+YX + Y is ____.

  4. Question 4

    Biomolecules. This type asked 5 times: 14 Jun 2022, 26 Jul 2022, 29 Jul 2022, 29 Jan 2024, 29 Jan 2025. This one: 29 Jan 2025 See all 5 of this type

    43
    Match List-I with List-II.
    List-I (Carbohydrate)List-II (Linkage, Source)
    (A)Amylose(I)β−C1−C4\beta-C_{1}-C_{4}, plant
    (B)Cellulose(II)α−C1−C4\alpha-C_{1}-C_{4}, animal
    (C)Glycogen(III)α−C1−C4\alpha-C_{1}-C_{4}, α−C1−C6\alpha-C_{1}-C_{6}, plant
    (D)Amylopectin(IV)α−C1−C4\alpha-C_{1}-C_{4}, plant
    Choose the correct answer from the options given below:

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  5. Question 5

    Chemical Bonding and Molecular Structure. This type asked 5 times: 2021 Paper 21, 1 Feb 2024, 4 Apr 2024, 6 Apr 2024, 29 Jan 2025. This one: 29 Jan 2025 See all 5 of this type

    44
    The steam volatile compounds among the following are : (A) (B) (C) (D) Choose the correct answer from the options given below :

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