Question
Chemistry Question on Organic Chemistry- Some Basic Principles and Techniques
Correct the increasing order of acidity is as
A
H2O,C2H2,H2CO3, phenol
B
C2H2,H2O,H2CO3, phenol
C
Phenol, C2H2,H2CO3,H2O
D
C2H2,H2O,phenolandH2CO3
Answer
C2H2,H2O,phenolandH2CO3
Explanation
Solution
C2H2 have acidic nature but it is less acidic than
water but phenol is more acidic than water due to
resonance stabilisation of phenoxide ion. H2CO3 is
most acidic due to resonating stabilisation of
carbonate ion (CO32−).
Thus, the correct order is
C2H2<H20<phenol<H2CO3