Carboxylic acids are most acidic and alcohols are least acidic. Phenols are more acidic than alcohols but less acidic than carboxylic acids or carbonic acid. Thus, acidic strength order is R−O∣∣C−OH>H−O−H>R−O−H>H−C≡C−H Related Theory Acid strength increases with : 1. increasing electronegativity of the central atom: The more electronegative the central atom, the more electron drift occurs, polarizing the O−H bond which makes it easier for the molecule to dissociate. 2. increasing oxidation number of the central atom: The higher the oxidation state of the central atom, the greater the number of oxygens attached to the central atom. Oxygen is a highly electronegative element, contributing to greater electron drift away from the O−H bond.
Which one of the following orders of acid strength is correct?
NEET UG 2003 — Chemistry Organic Chemistry
2003mcqeasy
Which one of the following orders of acid strength is correct?
Official previous-year question
Held on 30 Apr 2003 · Verified 9 Jul 2026.
Options
- A
RCOOH>ROH>HOH>HC≡HC
- B
RCOOH>HOH>ROH>HC≡CH
- C
RCOOH>HOH>HC≡CH>ROH
- D
RCOOH>HC≡CH>HOH>ROH
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