Sour tasting things contain acids. They are only weak solutions of acid as something that is strongly acidic will burn human skin. A bee sting contains an acid, our stomach contains hydrochloric acid and a car battery contains a very strong solution of sulphuric acid. Acids are very widely used in the chemical industry. Pollution from power stations causes acid rain, which kills trees and fish.
Question: It can be inferred from the passage that the hydrochloric acid in our stomachs is weak.
Options:
A. true, B. false, C. uncertain
Answer: B