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Amine with the highest pKb (aniline among alkylamines)

The same question, asked 2 times: 11 May 2024 S1*, 22 Apr 2025 S2. Every wording below, oldest first.

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  1. Question 1

    11 May 2024 S1

    57
    Which among the following amines has highest value of pKbpK_b?

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  2. Question 2

    22 Apr 2025 S2

    98
    Identify the amine having highest pKbpK_{b} value.

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