Please solve question no. 13(image attached)Which of the compounds require least KMNO4 for complete oxidation.

To determine which compound requires the least amount of potassium permanganate (KMnO4) for complete oxidation, we need to consider the oxidation states of the elements in each compound and how many electrons are involved in the oxidation process. KMnO4 is a strong oxidizing agent, and its effectiveness depends on the number of electrons that need to be transferred during the reaction.

Understanding Oxidation and KMnO4

Oxidation involves the loss of electrons, and KMnO4 can accept these electrons, thereby oxidizing the compound. The more electrons a compound can donate, the more KMnO4 it will require for complete oxidation. Therefore, we need to analyze the oxidation states of the compounds in question.

Analyzing the Compounds

Let’s say we have several organic compounds, such as alcohols, aldehydes, and ketones. Each of these compounds has a different number of hydrogen atoms or functional groups that can be oxidized. Here’s a general approach to analyze them:

• Alcohols: Primary alcohols can be oxidized to aldehydes and then to carboxylic acids, while secondary alcohols can be oxidized to ketones. Tertiary alcohols do not oxidize easily.
• Aldehydes: These can be oxidized to carboxylic acids, which typically requires less KMnO4 compared to alcohols.
• Ketones: Generally, they are more stable and require more KMnO4 for oxidation compared to aldehydes.

Example Calculation

Let’s consider a primary alcohol, a secondary alcohol, and an aldehyde. For instance:

• **Ethanol (C2H5OH)**: Oxidizes to acetaldehyde (C2H4O) and then to acetic acid (C2H4O2). This process involves the transfer of 4 electrons.
• **Isopropanol (C3H8O)**: Oxidizes to acetone (C3H6O), which involves the transfer of 2 electrons.
• **Acetaldehyde (C2H4O)**: Oxidizes to acetic acid (C2H4O2), requiring 2 electrons.

In this scenario, isopropanol would require less KMnO4 for complete oxidation compared to ethanol, as it involves fewer electrons being transferred. Acetaldehyde would require the least amount of KMnO4 since it only needs to be oxidized to acetic acid.

Conclusion

To summarize, the compound that requires the least KMnO4 for complete oxidation is typically the one that has the lowest number of electrons to lose during the oxidation process. In our example, acetaldehyde would be the compound needing the least KMnO4. Always remember to analyze the structure and oxidation states of the compounds involved to make an informed decision.