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Chapter 7: Problem 66

This section contains multiple choice questions. Each question has 4 choices (a), (b), (c) and (d), out of which ONLY ONE is correct. The oxidation of monosaccharides using periodic acid, will work well (a) in aqueous medium (b) in organic solvent (c) in the presence of a catalyst (d) in the presence of base

Short Answer

Expert verified
Answer: (a) In an aqueous medium

Step by step solution

01

Option (a) - Aqueous Medium

Periodic acid (HIO4) is a strong oxidizing agent and is soluble in water. In an aqueous medium, periodic acid can effectively cleave vicinal diol groups present in carbohydrates. The resulting product is a pair of aldehyde or ketone groups. This oxidation process works well in an aqueous medium as the reactants and products are soluble in water, leading to better interaction between them.
02

Option (b) - Organic Solvent

The use of organic solvents for the oxidation of monosaccharides with periodic acid is not ideal as it might lead to reduced solubility and a retarded reaction. Additionally, organic solvents can sometimes participate in side reactions, causing unwanted products.
03

Option (c) - Presence of a Catalyst

Generally, periodic acid oxidation reactions do not require the presence of a catalyst. Using a catalyst in such reactions may lead to unnecessary complications or side reactions.
04

Option (d) - Presence of a Base

Periodic acid is an oxidizing agent, and thus, its strength can be affected by the pH of the reaction medium. The presence of a base can alter the pH, potentially affecting the efficiency of the oxidation reaction. It is not recommended to perform the reaction in basic conditions. Based on the discussion above, the correct choice for the oxidation of monosaccharides using periodic acid is:
05

Correct Answer

(a) In an aqueous medium

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