Question

What is the decreasing order of strength of bases?

OH^- , NH^-₂ , H – C = C^- and CH₃ – CH^-₂ 

(a) OH^- > NH₂^- > H – C = C > CH₃ – CH₂^-

(b) NH₂^- > OH^-  >CH₃ – CH^-₂  > H – C = C^-

(c) CH₃ – CH^-₂, > NH₂^- > H – C = C^- >OH^-

(d) OH^- > H – C = C > CH₃ – CH^-₂> NH₂^-

Answer 1

(c) CH₃ – CH^-₂ , > NH^-₂ > H – C = C^- > OH^- 

Acid strength decreases in the order 

HOH > CH = CH > NH₃ > CH₃CH₃

Its conjucate bases arc in the reverse order 

CH₃ – CH^-₂ > NH^-₂ > H – C = C > OH^-