Can yeast and lemon juice b used for self inflating balloon?

Yes, yeast and lemon juice can be used to inflate a balloon through a simple chemical reaction. When yeast ferments sugars, it produces carbon dioxide gas, which can fill a balloon. The acidity of lemon juice can provide an additional source of sugar for the yeast to ferment, enhancing the gas production. However, the effectiveness may vary based on the amount of sugar and yeast used.