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  4. Baking soda or baking powder is

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Q. Baking soda or baking powder is

AIIMSAIIMS 2000The s-Block Elements

Solution:

Baking soda is sodium bicarbonate (NaHCO3 ). It is obtained as the intermediate product in the Solvay ammonia soda process. Normal carbonate can be changed to bicarbonate by passing CO2 through its saturated solution.
Na2CO3 + H2O + CO2 $\rightarrow$ 2NaHCO3