Question

Identify the wrong statements and correct them.
A. Sodium benzoate is used in food preservatives.
B. Nitric acid is not used as fertilizer in agriculture.
C. Sulphuric acid is called the king of chemicals.
D. The pH of acid is greater than 7.
E. Acetic acid is used in aerated drinks.

Answer 1

Hint:To answer this question, you should recall the concept of food preservatives, uses of nitric acid, sulphuric acid and the pH scale. You should also know the acid used in aerated drinks. It is the acid formed on reaction of carbon dioxide with water.

Complete step by step answer:
A.Sodium benzoate is a preservative added to some sodas, packaged foods, and personal care products to prolong shelf life. It’s an odourless, crystalline powder made by combining benzoic acid and sodium hydroxide. Benzoic acid is a good preservative on its own, and combining it with sodium hydroxide helps it dissolve in products. The statement is correct.
B.In fertilizer production, Nitric acid is used for manufacturing different types of nitrogenous fertilizers like calcium nitrate, ammonium nitrate, etc. Nitric acid is a key component which is also a by-product of Ammonia. The most common use of Nitric acid is found in schools where it is often utilized as a laboratory reagent. Hence, this statement is incorrect as nitric acid is used as fertilizer in agriculture.
C.Sulphuric acid is used in raw material in a lot of industries like fertilizers, steel and iron, chemical manufacturing, petroleum refining, a cleaning agent in industries to remove the rust from steel and iron. It is used as a catalyst to convert cyclohexanone oxime to caprolactam used to make nylon. It is used in lead-acid batteries as an electrolyte. It is used in making ammonium sulfate. It is used in storage batteries. Sulfuric acid is sometimes referred to as the “king of chemicals” because it is produced worldwide in such large quantities. Per capita use of sulfuric acid has been taken as one index of the technical development of a country. The statement is correct.
D.This statement is incorrect as the pH of an acid is always less than 7
E.Wrong statement. Carbonic acid is used in aerated drinks.

Note:
You should know about the other uses of nitric acid: Nitric acid is the building block chemical for the production of many other chemical compounds. It is used in manufacturing several types of polymers like polyamides and polyurethane. Nitric acid is also commonly used as rocket propellants in the aerospace industry. It is also used for manufacturing nitrogen-based compounds like nylon as well as most of the explosives like trinitrotoluene (T.N.T.), nitroglycerin, amongst others.