Question

A white a white powder is added while baking bread cake to make them fluffy and soft write the names formula of powder write it chemical reaction taking place when they powder is heated during baking

Answer 1

It is Baking Soda.

Chemical name is Sodium bicarbonate(NaHCO3).When it is heated during cake preparation,decomposition reaction takes place as follows,
2 NaHCO3(s) → Na2CO3(s) + CO2(g) + H2O(g)

Carbon dioxide(CO2)is the compound which makes the cake soft/fluffy.
Na2CO3 is sodium carbonate and mainly known as Washing soda.

Thanks.
Tripathy