Question

Which of the following statements is true for acids?
(A) Bitter and change red litmus to blue
(B) Sour and change red litmus to blue
(C) Sour and change blue litmus to red
(D) Bitter and change blue litmus to red

Answer 1

Any substance that changes the colour of certain indicators (e.g., reddens blue litmus paper), reacts with specific metals (e.g., iron) to liberate hydrogen, reacts with bases to produce salts, and encourages certain chemical reactions in a water solution (acid catalysis).

Complete Step By Step Answer:
An acid is a chemical that can form a covalent bond with an electron pair. Citrus fruits such as oranges and lemons, for example, contain citric acid; vinegar includes acetic acid; and, in reality, our stomach utilises hydrochloric acid for digestion. Acids have a sour flavour to them. It forms ${H_2}$ when it reacts with metals, and salt, carbon dioxide, and water when it combines with carbonates. Acids change the colour of litmus paper from blue to red. The $pH$ scale can be used to determine the strength of an acid. Acids cling to things. The burning of the nose is a common side effect of acids.
Hence, from the above information it can be concluded that acid tastes Sour and changes blue litmus to red.
The correct option is: (C) Sour and change blue litmus to red.

Note:
Acids are present in every aspect of our lives. Acids are essential reagents in practically every process in modern business. Sulfuric acid, a diprotic acid, is the most often used acid in industry and the world's most widely manufactured industrial chemical. It is primarily used in the manufacture of fertiliser, detergent, batteries, and dyes, as well as in the processing of a variety of products, such as the removal of contaminants. Acids react in neutralisation processes to form salts in the chemical industry.