Question

What is the decreasing order of strength of the bases OH^-, NH^-₂, H - C ≡ C^- and CH₃ - CH^-₂?

(a) CH₃ - CH^-₂ > NH^-₂ > H - C ≡ C^- > OH^-

(b) H-C ≡ C^-  > CH₃ - CH^-₂ > NH^-₂ >OH^-

(c)OH^- > NH^-₂ > H - C ≡ C^- > CH₃ - CH^-₂ 

(d) NH^-₂ > H - C ≡ C^- > OH^- > CH₃ - CH^-₂

Answer 1

The correct option (a) CH₃ - CH^-₂ > NH^-₂ > H - C ≡ C^- > OH^-

Explanation:

Order of basic strength

because their acids have following order of acidic strength

(conjugate base of strong acid is weaker while conjugate base of weak acid is stronger.)