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Day 124: JEE Mains Chemistry

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

  1. Question 1

    Structure of Atom. Asked once: 23 Jan 2026 S1 (same type asked 6 times) See all 6 of this type

    26
    Which of the following statements regarding the energy of the stationary state is true in the following one-electron system ?

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  2. Question 2

    The d- and f-Block Elements. Asked once: 24 Jan 2026 S1 (same type asked 6 times) See all 6 of this type

    50
    X and Y are the number of electrons involved, respectively during the oxidation of I−I^{-}to I2I_{2} and S2−S^{2 -} to S by acidified K2Cr2O7K_{2}{Cr}_{2}O_{7}. The value of X+YX + Y is____\_\_\_\_ .

  3. Question 3

    Equilibrium. Asked once: 22 Jan 2026 S2 (same type asked 6 times) See all 6 of this type

    38
    Which of the following mixture gives a buffer solution with pH=9.25pH = 9.25 ? Given : pKb(NH4OH)=4.75pK_{b}\left( NH_{4}OH \right)= 4.75

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  4. Question 4

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 23 Jan 2026 S2 (same type asked 6 times) See all 6 of this type

    33
    Iodoform test can differentiate between (A) Methanol and Ethanol (B) CH3COOH{CH}_{3}COOH and CH3CH2COOH{CH}_{3}{CH}_{2}COOH (C) Cyclohexene and cyclohexanone (D) Diethyl ether and Pentan-3-one (E) Anisole and acetone Choose the correct answer from the options given below:

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  5. Question 5

    Biomolecules. Asked once: 7 Apr 2025 (same type asked 6 times) See all 6 of this type

    43
    Given below are two statements : Statement I: D-(+)-glucose + D-(+) fructose →−H2O \overset{- H_{2}O\ }{\rightarrow} sucrose sucrose → Hydrolysis  \overset{\text{~Hydrolysis~}\ }{\rightarrow} D-(+)-glucose + D-(+) fructose Statement II : Invert sugar is formed during sucrose hydrolysis. In the light of the above statements, choose the correct answer from the options given below

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