Question:

The correct order of acidic strength of (i) Alcohol (ii) Acetic acid (iii) 2,4,6-Trinitrophenol (iv) Phenol is

Updated On: Jun 7, 2022
  • (ii) > (iii) > (iv) > (i)
  • (iii) > (ii) > (iv) > (i)
  • (iii) > (iv) > (ii) > (i)
  • (iv) > (iii) > (ii) > (i)
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The Correct Option is A

Solution and Explanation

Phenoxide ion is more stable than alkoxide ion due to resonance so, phenol is more acidic than alcohol. Also carboxylate ion is much more resonance stabilized than phenoxide ion. Therefore, acetic acid is stronger acid than phenol. Electron withdrawing grous increases acidity of phenols. Hence, the order of acidic strength is
${ $\underset{\text{(ii)}}{{Acetic acid }}$ > 2, 4, 6- $\underset{\text{(iii)}}{{Trinitrophenol }}$ > $\underset{\text{(iv)}}{{Phenol }}$ > $\underset{\text{(i)}}{{Alcohol }}$ }$
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Concepts Used:

Carbonyl Compounds

The compounds that contain a carbonyl group (the – C=O group) are called carbonyl compounds.

In organic chemistry, the carbonyl group is considered to be the most important functional group. These compounds are the fundamental part of organic chemistry and their primary members are aldehydes, ketones, and carboxylic acids.

Examples of Carbonyl Compounds:

Organic substances include urea and carbamates, to name a few. acyl chlorides, chloroformates, carbonate esters, lactones, lactams, isocyanates, and hydroxamates are examples of phosphorene derivatives.

Carbonyl Group:

Carbon monoxide can also be used as a ligand, either as a ligand or as an organometallic compound (a metal carbonyl, for example, nickel carbonyl).

A carbonyl group is a functional group that consists of a double-bonded carbon atom and an oxygen atom: C=O, according to organic chemistry. Many organic compound classes are found in a variety of larger functional groupings. A carbonyl compound is a substance that has a carbonyl group in it.