A) Sodium hydrogen carbonate, tartaric acid, \[C{{O}_{2}}\]
B) Sodium carbonate, acetic add, \[C{{O}_{2}}\]
C) Sodium hydroxide, acetic acid, \[{{H}_{2}}\]
D) Sodium chloride, oxalic acid, \[{{H}_{2}}\]
Correct Answer: A
Solution :
Baking powder is a mixture of baking soda (sodium hydrogen carbonate) and a mild edible acid such as tartaric acid. When baking powder is heated, carbon dioxide \[(C{{O}_{2}})\] gas is produced which causes bread or cake to rise, making them soft and spongy. \[\underset{\begin{smallmatrix} Sodium\,hydrogen \\ carbonate \end{smallmatrix}}{\mathop{2NaHC{{O}_{3(s)}}}}\,\xrightarrow{heat}\underset{\begin{smallmatrix} Sodium \\ carbonate \end{smallmatrix}}{\mathop{N{{a}_{2}}C{{O}_{3(s)}}}}\,+\underset{Water}{\mathop{{{H}_{2}}{{O}_{(l)}}}}\,+\underset{\begin{smallmatrix} Carbon \\ dioxide \end{smallmatrix}}{\mathop{C{{O}_{2(g)}}}}\,\]
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