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Day 164: 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: 3 Apr 2025 (same type asked 3 times) See all 3 of this type

    115
    Given below are two statements : Statement I : Hyperconjugation is not a permanent effect. Statement II : In general, greater the number of alkyl groups attached to a positively charged C -atom, greater is the hyperconjugation interaction and stabilization of the cation. In the light of the above statements, choose the correct answer from the options given below

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  2. Question 2

    Electrochemistry. Asked once: 1 Feb 2023 (same type asked 3 times) See all 3 of this type

    57
    At what pHpH, given half cell MnO4−(0.1M)∣Mn2+(0.001M)MnO_{4}^{-}(0.1M) \mid Mn^{2 +}(0.001M) will have electrode potential of 1.282 V1.282\text{ }V ? (Nearest Integer)
     Given EMnO4∣−Mn+2o=1.54 V,2.303RTF=0.059 V\text{~Given~}E_{MnO_{4 \mid}^{-}Mn^{+ 2}}^{o}= 1.54\text{ }V,\frac{2.303RT}{F}= 0.059\text{ }V

  3. Question 3

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 1 Feb 2024 (same type asked 3 times) See all 3 of this type

    48
    Match List - I with List - II.
    List - I (Reactions)List - II (Reagents)
    (A)CH3(CH2)5COOC2H5→CH3(CH2)5CHOCH_{3}(CH_{2})_{5}COOC_{2}H_{5} \rightarrow CH_{3}(CH_{2})_{5}CHO(I)CH3MgBr, H2OCH_{3}MgBr,\ H_{2}O
    (B)C6H5COC6H5→C6H5CH2C6H5C_{6}H_{5}COC_{6}H_{5} \rightarrow C_{6}H_{5}CH_{2}C_{6}H_{5}(II)Zn(Hg)Zn(Hg) and conc. HClHCl
    (C)C6H5CHO→C6H5CH(OH)CH3C_{6}H_{5}CHO \rightarrow C_{6}H_{5}CH(OH)CH_{3}(III)NaBH4, H+NaBH_{4},\ H^{+}
    (D)CH3COCH2COOC2H5→CH3CH(OH)CH2COOC2H5CH_{3}COCH_{2}COOC_{2}H_{5} \rightarrow CH_{3}CH(OH)CH_{2}COOC_{2}H_{5}(IV)DIBAL-H, H2OH_{2}O
    Choose the correct answer from options given below:

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  4. Question 4

    Haloalkanes and Haloarenes. Asked once: 21 Jan 2026 S2 (same type asked 3 times) See all 3 of this type

    37
    The correct order of the rate of the reaction for the following reaction with respect to nucleophiles is:
    CH3Br+NuΘ⟶CH3Nu+BrΘCH_{3}Br +Nu^{\Theta}\longrightarrow CH_{3}Nu +Br^{\Theta}

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  5. Question 5

    Hydrocarbons. Asked once: 29 Jan 2025 (same type asked 3 times) See all 3 of this type

    108
    Given below are two statements : Statement (I) : On nitration of m-xylene with HNO3,H2SO4HNO_{3},H_{2}SO_{4} followed by oxidation, 4-nitrobenzene-1, 3-dicarboxylic acid is obtained as the major product. Statement (II) : CH3CH_{3} group is o/p-directing whileNO2NO_{2} group is m-directing group. In the light of the above statements, choose the correct answer from the options given below :

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