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Day 387: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 8 Apr 2026 S2

    42
    Consider the following reaction. The major product (P)(P) formed is :

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  2. Question 2

    Amines. Asked once: 6 Apr 2026 S2

    42
    Consider the following organic reaction sequence. Choose the final product (X) from the following (consider the major product in all intermediate reactions)

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  3. Question 3

    Biomolecules. Asked once: 8 Apr 2026 S2

    44
    The incorrect statement from the following with respect to carbohydrates is :

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  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 6 Apr 2026 S1

    29
    The pairs among A=[SO3 2−,CO3 2−],B=[O2 2−,F2],C=[CN−,CO]A =\left\lbrack SO_{3}\ ^{2 -},CO_{3}\ ^{2 -} \right\rbrack,B =\left\lbrack O_{2}\ ^{2 -},F_{2} \right\rbrack,C =\left\lbrack CN^{-},CO \right\rbrack, D=[NH3,H3O+]D =\left\lbrack NH_{3},H_{3}O^{+} \right\rbrackand E=[MnO4 2−,CrO4 2−]E =\left\lbrack MnO_{4}\ ^{2 -},CrO_{4}\ ^{2 -} \right\rbrack that do not have similar Lewis dot structure are :

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  5. Question 5

    Chemical Kinetics. Asked once: 8 Apr 2026 S2

    32
    Given below are two statements : R=8.314 J K−1 mol−1R = 8.314\text{ }J{\text{ }K}^{- 1}{\text{ }mol}^{- 1} and 1cal=4.2 J1cal = 4.2\text{ }J Statement I : When Ea=12.6kcal/molEa = 12.6kcal/mol, the room temperature rate constant is doubled by a 10∘C10^{\circ}C increase in temperature ( 298 K to 308 K ) Statement II : For a first order reaction A→BA \rightarrow B, the plot of t1/2t_{1/2} against [A]0\lbrack A\rbrack_{0} is as shown in the figure. Here [A]0\lbrack A\rbrack_{0} is the initial concentration of A and t1/2t_{1/2} is half-life of reaction. In the light of the above statements, choose the correct answer from the option given below :

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