Which of the following is produced when baking powder is heated?

Correct option is A

The correct answer is that when baking powder is heated, carbon dioxide and sodium carbonate are produced. 

• The chemical reaction is NaHCO3 → Na2CO3 + CO2 + H2O. 
• Baking powder contains sodium bicarbonate, or NaHCO3, which acts as a leavening agent. 
• When baking powder is combined with water and heat, the sodium bicarbonate reacts with acid salts to produce carbon dioxide gas. 
• This gas expands the cells in the batter, which gives baked goods their fluffy texture. 
• Sodium bicarbonate starts to decompose when heated above 50°C, and fully decomposes at 270°C. 
• When it decomposes, it emits carbon dioxide, water, and sodium carbonate, as well as acrid smoke and fumes.