Question

A housewife found that the cake prepared by her is hard and small in size. Which ingredient has she forgotten to add that would have made the cake fluffy?

Answer 1

1. The most important ingredient that must be added while making a cake is baking soda. It helps to make the cake fluffy by producing carbon dioxide in the cake when it is heated and leaves small holes (bubbles) in it. The chemical name of baking soda is Sodium bicarbonate or Sodium hydrogen carbonate. It is represented by the chemical formula ${\mathrm{NaHCO}}_3$.
2. Hence, the ingredient that she has forgotten to add that makes the cake fluffy is Baking soda.