PYQ Vault
EbooksTutor

Identify Bronsted acids, bases and conjugate pairs in a given equilibrium

This type of question, asked 5 times: 2 May 2023 S2, 9 May 2023 S1, 14 May 2024 S2, 22 Apr 2025 S1, 22 Apr 2025 S2. All 5 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    2 May 2023 S2

    93
    Which from the following species acts as a base according to the Bronsted-Lowry theory? (For the reaction HCl+NH3⇌NH4++Cl−\text{HCl} + \text{NH}_3 \rightleftharpoons \text{NH}_4^+ + \text{Cl}^-)

    Tap an option to check your answer.

  2. Question 2

    9 May 2023 S1

    84
    Which among the following is correct conjugate acid-base pair for the equation stated below? HCl+NH3⇌NH4++Cl−\text{HCl} + \text{NH}_3 \rightleftharpoons \text{NH}_4^+ + \text{Cl}^-

    Tap an option to check your answer.

  3. Question 3

    14 May 2024 S2

    93
    Identify base2_2 for following equation according to Brønsted-Lowry theory: HCl(aq)+H2O(l)⇌H3O(aq)++Cl(aq)−\text{HCl}_{(aq)} + \text{H}_2\text{O}_{(l)} \rightleftharpoons \text{H}_3\text{O}^+_{(aq)} + \text{Cl}^-_{(aq)}

    Tap an option to check your answer.

  4. Question 4

    22 Apr 2025 S1

    51
    Identify the conjugate acid-base pair respectively from following equilibrium reaction.
    HPO4(aq)2−+H2O(l)⇌PO4(aq)3−+H3O(aq)+HPO_{4(aq)}^{2 -}+H_{2}O_{(l)}\rightleftharpoons PO_{4(aq)}^{3 -}+H_{3}O_{(aq)}^{+}

    Tap an option to check your answer.

  5. Question 5

    22 Apr 2025 S2

    51
    Identify conjugate acid-base pair from following equilibrium reaction.
    HSO3(aq)−+H3O(aq)+⇌H2SO3+H2OHSO_{3(aq)}^{-}+H_{3}O_{(aq)}^{+}\rightleftharpoons H_{2}SO_{3}+H_{2}O

    Tap an option to check your answer.