Consider the following statements: 1. Anhydrous sodium carbonate is commonly known as baking soda. 2. Baking soda is used in fire extinguishers. 3. Bleaching powder is manufactured in Hasenclever plant. Which of the statements is/are correct?

1. Statement 1 is incorrect. Anhydrous sodium carbonate (Na2CO3) is commonly known as soda ash. Baking soda is sodium bicarbonate (NaHCO3). 2. Statement 2 is correct. Baking soda (sodium bicarbonate) decomposes upon heating or reacts with acids to release carbon dioxide (CO2). This property allows it to be used in certain types of fire extinguishers (dry chemical B:C type) to smother flames. 3. Statement 3 is correct. The Hasenclever plant is a specific industrial setup designed for the large-scale manufacture of bleaching powder (calcium hypochlorite, CaOCl2). 4. Based on the official answer key (B), statements 2 and 3 are correct.