Which of the following is not a mineral acid?(a) Hydrochloric acid(b) Citric acid(c) Sulphuric acid(d) Nitric acid

To determine which of the following is not a mineral acid, we need to understand what mineral acids are. Mineral acids are inorganic acids that are derived from minerals or mineral-like substances. They are typically strong acids that dissociate completely in water.

Let's analyze each option:

(a) Hydrochloric acid: Hydrochloric acid is a strong mineral acid. It is derived from minerals and is commonly used in various industrial processes.

(b) Citric acid: Citric acid is not a mineral acid. It is an organic acid that is naturally found in citrus fruits like lemons and oranges. It is commonly used as a food additive and for various other purposes.

(c) Sulphuric acid: Sulphuric acid is a strong mineral acid. It is derived from minerals and is widely used in industries such as manufacturing, chemical synthesis, and battery production.

(d) Nitric acid: Nitric acid is a strong mineral acid. It is derived from minerals and is commonly used in industries such as metal etching, fertilizer production, and explosives manufacturing.

Based on the above analysis, the answer is (b) Citric acid, as it is not a mineral acid.