Answer:
The pH for hydrochloric acid secreted from stomach lining to help break down food is 1
Step-by-step explanation:
The hydrochloric acid is being secreted from the parietal cells of the stomach play an important role in protein digestion.
Hydrochloric acid helps in the denaturation of intaked protein which makes those protein molecule suceptable for further digestion.
Hydrochloric acid also helps to kills pathogenic bacteria present in stomach by its very low pH.