Question

Identify the wrong statement *
(a) Higher the hydronium ion concentration lower is the pH value.
(b) Universal indicator can be used to check the strength of an acid or base.
(c) As the pH value increases from 7 to 14,it represents increase hydronium ion concentration in the solution
(d) Value less than 7 on the pH scale represents an acidic solution.​

Answer 1

(c) As the pH value increases from 7 to 14, it represents increase hydronium ion concentration in the solution is the wrong statement.

• Hydronium ion concentration is high in acidic conditions. This is indicated by low pH.
• Hydroxyl ion concentration is high in the basic medium, which is further indicated by high pH.
• The pH range for the acidic medium is 0 to 7 and 7 to 14 for the basic medium. 7 pH indicates a neutral medium.
• A universal indicator shows different colours for different strengths of acid and base and hence is used as an indicator.