In nature, ammonia is synthesisd by nitrifying bacteria using enzymes while in industry it is manufactured from `N_(2)` and `H_(2)` using iron oxide catalyst at `550^(ul@) C`. Under the same industrial conditions, enzymes cannot be used because

Options

A. enzymes get deactivated at high temperature
B. enzymes catalyze reactions only in living systems
C. the reaction becomes vigorous and uncontrollable
D. the enzymes use nitrates in place of `N_(2)`.

Answer

To solve the question, we need to understand why enzymes cannot be used in industrial conditions for the synthesis of ammonia, particularly at high temperatures like 550 °C.

### Step-by-Step Solution:

1. **Understanding Enzymes**: Enzymes are biological catalysts made up of proteins. Proteins are polymers formed from amino acids linked by peptide bonds.

2. **Temperature Sensitivity of Enzymes**: Enzymes have an optimal temperature range in which they function effectively. Beyond this range, particularly at high temperatures, the structure of enzymes can be compromised.

3. **Effect of High Temperature**: At elevated temperatures, such as 550 °C, the bonds that hold the amino acids together in the enzyme's structure begin to break. This process is known as denaturation.

4. **Denaturation of Enzymes**: When enzymes denature, their three-dimensional structure is altered, leading to a loss of their catalytic activity. This means that they can no longer facilitate the chemical reactions they are supposed to catalyze.

5. **Conclusion**: Therefore, under industrial conditions where the temperature is significantly high (550 °C), enzymes cannot be used for ammonia synthesis because they would be deactivated due to the breaking of bonds between amino acids, leading to the disruption of their structure.

### Final Answer:
Enzymes cannot be used under industrial conditions at 550 °C because they get deactivated due to the breaking of bonds between amino acids, which disrupts their structure.

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