Which of the following is a weak base? A) NH(CH₃)₂ B) O₂ C) KOH D) CH₂CBr₂ E) None of the above is a weak base.

Question

Quizplus · Accepted Answer

NH(CH3)2 is a weak base because it is a primary amine, meaning it can only donate one lone pair of electrons to act as a base. Additionally, the methyl groups attached to the nitrogen atom increase its bulk and sterically hinder the donation of the lone pair. Choices B, C, and D are not weak bases - B is an oxide ion (strong base), C is a strong base (potassium hydroxide), and D is a quaternary ammonium salt (not a base at all). Therefore, A is the best choice for a weak base.

Which of the Following Is a Weak Base