Question

Which of the following is not a property of an acid?

• A. Acids turn blue litmus red
• B. Acids turn red litmus blue
• C. Acids taste sour
• D. The chemical nature of acid is acidic

Answer 1

The correct option is B

Acids turn red litmus blue

An acid (from the Latin word "acidus" meaning sour) is a chemical substance whose solutions have a sour taste, can turn blue litmus red and react with bases and certain metals (like calcium) to form salts. An aqueous solution of an acid has a pH of less than 7.