which compound plays an important role in leather processing and electroplating?\no nitric acid\no…

Brief Explanations:

Hydrochloric acid is used in leather processing for tanning and in electroplating to clean and prepare metal surfaces. Nitric acid is mainly used in metal - treating and chemical synthesis. Ammonia is used in refrigeration and as a cleaning agent in some cases. Magnesium hydroxide is an antacid and used in wastewater treatment.

Answer:

B. hydrochloric acid