Question

why cake or bread swells on addition of baking powder write the chemical equation involved

Answer 1

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.

$\bold{\red{EQUATION:}}$

2NaHCO3 -----$\bold{heat}$-----> Na2CO3 + CO2 + H2O

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