Which of the following statements is TRUE about acids?

Correct option is D

The correct answer is (d) Sour and change blue litmus to red.
· Acids are characterized by their sour taste and their ability to change blue litmus paper to red.
· This property is a standard test in chemistry to identify acidic substances. Acids release hydrogen ions (H⁺) in aqueous solutions, which is responsible for their acidic nature.
Information Booster:
· Litmus paper is a pH indicator used to determine whether a substance is acidic or basic.
· Blue litmus paper turns red in acidic solutions, while red litmus paper turns blue in alkaline solutions.
· Common acids include hydrochloric acid (HCl), sulfuric acid (H₂SO₄), and acetic acid (CH₃COOH), all of which exhibit these properties.