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(D) Baking powder is a mixture of $NaHCO_3$ (baking soda) and a mild edible acid (or acidic salt). $Ca(H_2PO_4)_2$ (calcium dihydrogen phosphate) and

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Both $(A)$ and $(C)$

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(D) Baking powder is a mixture of $NaHCO_3$ (baking soda) and a mild edible acid (or acidic salt). $Ca(H_2PO_4)_2$ (calcium dihydrogen phosphate) and $NaAl(SO_4)_2$ (sodium aluminum sulfate) act as acidic components. When moistened,these acidic salts react with $NaHCO_3$ to release $CO_2$ gas,which helps in the rising of dough. Therefore,both statements $(A)$ and $(C)$ are correct. Statement $(B)$ is incorrect because $NaAl(SO_4)_2$ acts as an acid source to facilitate the reaction,not to slow down the decomposition.

The more commonly used baking powder contains about $30 \% NaHCO_3, 20 \% NaAl(SO_4)_2, 10 \% Ca(H_2PO_4)_2$ and $40 \% $ starch. Which of the following statements is/are correct?

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