CUET Preparation Today
Gluconic acid is obtained when |
Sucrose is boiled with dil $HCl$ or $H_2SO_4$ in alcoholic solution. Glucose is treated with a mild oxidizing agent like bromine water. Upon hydrolysis of starch with dilute $H_2SO_4$ at 393 K under pressure. Glucose is prolonged heated with hydrogen iodide. |
Glucose is treated with a mild oxidizing agent like bromine water. |
The correct answer is Option (2) → Glucose is treated with a mild oxidizing agent like bromine water. Gluconic acid is formed by mild oxidation of the aldehyde (–CHO) group of glucose to a carboxylic acid (–COOH) without affecting the –OH groups. Option 1 Sucrose hydrolysis gives glucose and fructose. No oxidation occurs. Option 2 Glucose + Br₂ water → Gluconic acid Selective oxidation of –CHO group. Correct. Option 3 Hydrolysis of starch produces glucose. No oxidation. Option 4 Heating with HI reduces glucose to n-hexane. No gluconic acid formed. |
