The alloy used in the reduction of nitrites to ammonia is

Options

A. Gun metal
B. Devarda's alloy
C. Solder metal
D. Bronze

Answer

To solve the question regarding the alloy used in the reduction of nitrites to ammonia, we can follow these steps:

### Step 1: Identify the Options
The options provided are:
- Gunmetal
- Duralumin alloy
- Solder metal
- Bronze

### Step 2: Understand the Reduction Process
The reduction of nitrites to ammonia typically requires a reducing agent. In this context, we are looking for an alloy that acts as a reducing agent.

### Step 3: Recognize the Correct Alloy
Among the options, the De Varda alloy is known for its reducing properties. It is an alloy of aluminum, copper, and zinc. This alloy is effective in reducing nitrites to ammonia, especially in an alkaline medium.

### Step 4: Conclusion
The correct answer to the question is the De Varda alloy, which is used in the reduction of nitrites to ammonia.

### Final Answer
The alloy used in the reduction of nitrites to ammonia is De Varda alloy.

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