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Day 143: JEE Mains Chemistry

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

  1. Question 1

    Equilibrium. Asked once: 28 Jan 2026 S1 (same type asked 4 times) See all 4 of this type

    50
    Consider the dissociation equilibrium of the following weak acid HA⇌H+(aq)+A−(aq)HA \rightleftharpoons H^{+}(aq) + A^{-}(aq) If the pKa of the acid is 4 , then the pH of 10 mM HA solution is ____\_\_\_\_ . (Nearest integer) [Given : The degree of dissociation can be neglected with respect to unity]

  2. Question 2

    Hydrocarbons. Asked once: 31 Jan 2024 (same type asked 4 times) See all 4 of this type

    144
    Number of isomeric products formed by monochlorination of 2-methylbutane in presence of sunlight is _____

  3. Question 3

    The p-Block Elements. Asked once: 30 Jan 2024 (same type asked 4 times) See all 4 of this type

    140
    Reduction potential of ions are given below:
    ClO4−IO4−BrO4−E∘=1.19 VE∘=1.65 VE∘=1.74 V\begin{matrix} ClO_{4}^{-} & IO_{4}^{-} & BrO_{4}^{-} \\ E^{\circ}= 1.19\text{ }V & E^{\circ}= 1.65\text{ }V & E^{\circ}= 1.74\text{ }V \end{matrix}
    The correct order of their oxidising power is:

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  4. Question 4

    Amines. Asked once: 23 Jan 2025 (same type asked 4 times) See all 4 of this type

    45
    Which among the following react with Hinsberg's reagent? (A) Aniline (B) N,N-Dimethylaniline (C) CH3−NH2CH_{3}-NH_{2} (D) N(CH3)3N\left( CH_{3} \right)_{3} (E) Diphenylamine. Choose the correct answer from the options given below :

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  5. Question 5

    Classification of Elements and Periodicity. Asked once: 10 Apr 2023 (same type asked 4 times) See all 4 of this type

    139
    The correct order of metallic character is:

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