Question

effervescence are formed when the batter for cake is heated. which substance is present in the batter. Name the gas evolved. WRITE THE CHEMICAL EQUATION INVOLED.

Answer 1

To bake a cake, substances which can lift the cake up are needed else the cake will not become fluffy and light.

Substance present in the batter when effervescence is heated is sodium hydrogen carbonate.

When sodium hydrogen carbonate gets heated while baking the cake, the gas evolved is sodium bi carbonate, carbon dioxide and water.

The chemical equation involved would be:

2NaHCO3 = Na2CO3 + CO2 + H2O

Answer 2

"The is are formed when the batter for cake is heated is explained below.

  We use baking soda in the baking of cake which releases carbon dioxide gas. The effervescence is formed due to the release of $CO_2$ gas only. When we heat the sodium bicarbonate which is the main ingredient of baking soda, it decomposes to sodium carbonate and releases water with carbon dioxide gas.  

  The chemical equation can be written as: $2NaH{ CO }_{ 3 }\quad \longrightarrow \quad { Na }_{ 2 }{ CO }_{ 3 }+{ H }_{ 2 }O+{ CO }_{ 2 }$"