Which of the following raw materials is NOT used to prepare the baking soda?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. Na2CO3
Baking soda (NaHCO₃) is mainly produced using the Solvay process, where the essential raw materials are sodium chloride (NaCl), ammonia (NH₃), and water (H₂O), along with carbon dioxide. Sodium carbonate (Na₂CO₃) is actually a product formed in the process and not a starting raw material. Hence, among the given options, Na₂CO₃ is not used as a raw material for preparing baking soda, making it the correct choice.