Industrially, ammonia is obtained by direct combination between nitrogen and hydrogen.
Is the formation of ammonia promoted by the use of high pressure or low pressure?

Explanation

To determine whether the formation of ammonia (NH₃) is promoted by high pressure or low pressure, we can analyze the chemical reaction involved in the process.

### Step-by-Step Solution:

1. **Identify the Reaction**:
The reaction for the formation of ammonia from nitrogen and hydrogen can be written as:
\[
N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)
...