What is the key practical difference between baking powder and baking soda, both commonly used as leavening agents in baking?

Explanation

The key practical difference between baking powder and baking soda is that baking powder already contains both a base, typically baking soda itself, and a dry acidic ingredient combined together, meaning it can react and produce carbon dioxide gas simply when moistened, without requiring an additional separate source of acid in the recipe. Baking soda alone, by contrast, requires a separate acidic ingredient in the recipe, such as buttermilk, yogurt, or lemon juice, to trigger the same gas-releasing reaction needed for proper leavening. Because of this difference, recipes are generally not able to freely substitute one for the other without adjusting other ingredients accordingly. Explore more Everyday Science MCQs on mcqstutor to keep practicing.