Question

Select the correct order of basic nature.

• A. $CH _{3} CH _{2}^{-}> CH _{2}= CH ^{-}> CH \equiv C ^{-}> OH$
• B. $CH _{3} CH _{2}^{-}> CH \equiv C ^{-}> CH _{2}= CH ^{-}> OH$
• C. $CH _{3} CH _{2}^{-}> OH ^{-}> CH \equiv C ^{-}> CH _{2}= CH$
• D. $OH ^{-}> CH \equiv C ^{-}> CH _{2}= CH ^{-}> CH _{3} CH _{2}^{-}$

Answer 1

Answer: (A)

Order of acidic strength is :

$H _{2} O > CH \equiv CH > CH _{2}= CH _{2}> CH _{3} CH _{3}$

We know that a stronger acid has weak conjugate base and vice versa, thus order of basic nature of given compounds is :

$CH _{3}- CH _{2}^{-}> CH _{2}= CH ^{-}> CH \equiv C ^{-}> OH ^{-}$