Question

Base strength of :
_ _ _
(A) H₃CCH₂ – , (B) H₂C = CH and (C) H - C ≡ C
is in the order of :
(a) (B) > (A) > (C) (b) (C) > (B) > (A)
(c) (A) > (C) > (B) (d) (A) > (B) > (C)

Answer 1

Base strength is in the order of :

A) Ethane B) Ethene and C) Ethyne

• Acidic strength is given on basis of s character in compound and carbon which is more negative to produce high positive hydrogen.

• Acidic strength is inversely proportional to s character.

• We know that ehtyne has the least amount of s character and then ethene

.•. Acidic strength would be

Ethyne > Ethene > Ethane

Opposite to that, Basic strength would be :

Ethane > Ethene > Ethyne

Correct option A) > B) > C)