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Day 391: JEE Mains Chemistry

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

  1. Question 1

    Aldehydes, Ketones and Carboxylic Acids. Asked once: 6 Apr 2026 S2

    40
    An optically active alkyl bromide C4H9BrC_{4}H_{9}Br, reacts with ethanolic KOH to form major compound [A] which reacts with bromine to give compound [B]. Compound [B] reacts with ethanolic KOH and sodamide to give compound [C]. One molecule of water adds to compound [C] on warming with mercuric sulphate and dilute sulphuric acid at 333 K to form compound [D]. The functional group in compound D will be confirmed by:

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  2. Question 2

    Amines. Asked once: 6 Apr 2026 S1

    43
    Arrange the following compounds according to increasing order of boiling points. n−C4H9OH(A),n−C4H9NH2( B)n -C_{4}H_{9}OH(A),n -C_{4}H_{9}NH_{2}(\text{ }B), n−C4H10(C)n -C_{4}H_{10}(C) and C2H5NHC2H5(D)C_{2}H_{5}NHC_{2}H_{5}(D).

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  3. Question 3

    Biomolecules. Asked once: 6 Apr 2026 S2

    44
    Consider the following reactions. Total number of electrons in the π\pi bonds and lone pair of electrons in the product ( X ) is:

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  4. Question 4

    Chemical Bonding and Molecular Structure. Asked once: 5 Apr 2026 S2

    34
    Given below are two statements : Statement-I : Aluminum upon reaction with NaOH forms [Al(OH)6]3−\left\lbrack Al(OH)_{6} \right\rbrack^{3 -} ion. Statement-II : The geometry of ICl4−,ClO3−{ICl}_{4}^{-},{ClO}_{3}^{-}and IBr2−{IBr}_{2}^{-}is square planar, pyramidal and linear respectively. In the light of the above statements, choose the correct answer from the options given below:

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  5. Question 5

    Chemical Kinetics. Asked once: 5 Apr 2026 S2

    50
    For a reaction A→PA \rightarrow P at TK, the half life (t1/2)\left( t_{1/2} \right) is plotted as a function of initial concentration [A]0\lbrack A\rbrack_{0} of A as given below : The value of x in the given figure is ____\_\_\_\_ s (Nearest integer)