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In a reaction RCHO is reduced to RCH(3) ...

In a reaction RCHO is reduced to `RCH_(3)` usig amalgamated zinc and cencentrated HCl and warming the solution. The reaction is known as

A

Meerwein - Ponndorf reaction

B

Clemmensen's reduction

C

Wolff - Kishner reduction

D

Schiff's reaction

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To solve the question regarding the reduction of an aldehyde (RCHO) to an alkane (RCH3) using amalgamated zinc and concentrated HCl, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Reactants**: The reaction involves an aldehyde (RCHO) being reduced. The reducing agent used is amalgamated zinc (Zn-Hg) along with concentrated hydrochloric acid (HCl). **Hint**: Recognize the structure of the aldehyde and the reducing agent involved in the reaction. 2. **Understand the Reaction Conditions**: The reaction takes place under warming conditions, which helps facilitate the reduction process. **Hint**: Remember that heating can often increase the rate of chemical reactions, especially reductions. 3. **Determine the Reaction Type**: The reaction is a reduction, where the carbonyl group (C=O) of the aldehyde is converted to a methylene group (–CH2–), resulting in the formation of an alkane (RCH3). **Hint**: Identify the functional groups involved and how they change during the reaction. 4. **Name the Reaction**: This specific reduction of aldehydes to alkanes using amalgamated zinc and concentrated HCl is known as **Clemenson's reduction**. **Hint**: Familiarize yourself with common name reactions in organic chemistry, especially those involving reductions. 5. **Evaluate the Options**: Given the options, the correct answer is Clemenson's reduction. The other options (Merwin-Pentroff reaction, volfication reduction, and Schiff's reaction) do not apply to this specific reaction. **Hint**: Cross-reference the characteristics of each name reaction with the reagents and products of the reaction in question. ### Final Answer: The reaction where RCHO is reduced to RCH3 using amalgamated zinc and concentrated HCl is known as **Clemenson's reduction**.
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