The chemical name of baking soda is: 

Correct option is C

· Baking soda is scientifically known as sodium hydrogen carbonate, with the chemical formula NaHCO₃.

· It is commonly used as a leavening agent in baking, where it reacts with acids (like vinegar or lemon juice) to produce carbon dioxide gas, causing dough or batter to rise.

• Sodium hydrogen carbonate is also known as bicarbonate of soda.
• It is a white, crystalline powder that is slightly alkaline and is often used for various household cleaning purposes, in addition to its culinary uses.

• Sodium carbonate (Na₂CO₃): Known as washing soda, it is different from baking soda. It is used for cleaning and water softening, not as a leavening agent in baking.
• Sodium citrate (Na₃C₆H₅O₇): This is the sodium salt of citric acid and is used as a food preservative and flavoring agent.
• Calcium hydrogen bicarbonate (Ca(HCO₃)₂): This is an unstable compound found in water, not used in baking.