Question

What is baking powder . how does it makecake soft and spongy

Answer 1

Baking powder is a mixture of sodium hydrogencarbonate and a solid edible acid such as tartaric acid or citric acid.
When baking powder mixes with water present in dough made for baking cake, then sodium hydrogencarbonate reacts with tartaric acid to evolve carbon dioxide gas. The carbon dioxide gas produced gets trapped in wet dough and bubbles out slowly making the cake to rise and become soft and spongy.

Answer 2

HELLO USER ,,

Baking powder - a mixture of powders used to make cakes rise and become light as they are baked...

Baking powder is mixed with the flour. When water is added to this flour to make dough, baking powder undergoes a chemical reaction during which carbon dioxide gas is produced. This carbon dioxide gas gets trapped into the dough and bubbles out which causes the cake to rise making it soft and spongy.

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