Number of compounds from the following which will not dissolve in cold $NaHCO _3$ and $NaOH$ solutions but will dissolve in hot $NaOH$ solution is______
Correct Answer: 3
Solution and Explanation
The correct answer is 3
Compound 2,3,7
Carboxylic acid group compound soluble in NaOH & NaHCO3 & phenol group containing groups reacts with NaOH
⇒ esters get dissolved in NaOH by hydrolysis
Top Questions on uses of carboxylic acids
The increasing order of acid strength of the following carboxylic acids is:
\[ (i) \text{(CH}_3\text{)}_3\text{C-COOH} \quad (ii) \text{(CH}_3\text{)}_2\text{CH-COOH} \quad (iii) \text{CH}_3\text{CH}_2\text{COOH} \]- KEAM - 2024
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Concepts Used:
Uses of Carboxylic Acids
Carboxylic acid makes up a series of fatty acids that is essential for human health. Some carboxylic acids such as omega-6 and omega-3 are not produced in the human body. This carboxylic acid helps in maintaining the cell membrane and control nutrient use along with metabolism. It is essential to consume those foods which have fatty acids.
- In food industries, organic acids are used to produce vinegar, sodium salts and other soft drinks and sodium benzoate is used to preserve foods.
- In chemical industries, Acetic is used to produce dye-stuff, perfumes and rayon’s etc.
- In rubber making industry, Acetic acids are used to manufacture the rubber
- To manufacture the soaps and detergents carboxylic acids such as stearic acids are the most important acid
- Hexanedioic acid is used during manufacturing of nylon in nylon industries
- Esters of benzoic acids are used to make perfume, body mist, etc.
- In drug-making industries, acetylsalicylic acid is used to produce aspirin, phenacetin, etc.
Read More: Uses of Carboxylic Acids