Difficult
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?
- A$Ca(H_2PO_4)_2$ is acidic and when moistened it reacts with $NaHCO_3$ evolving $CO_2$ gas
- B$NaAl(SO_4)_2$ slows down the decomposition reaction of $NaHCO_3$ so that $CO_2$ is evolved more slowly
- C$NaAl(SO_4)_2$ is acidic and when moistened it reacts with $NaHCO_3$ evolving $CO_2$
- DBoth $(A)$ and $(B)$
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Similar Questions
Substance $A_2B_{(g)}$ can undergo decomposition to form two sets of products. If the molar ratio of $A_{2(g)}$ to $A_{(g)}$ is $5 : 3$ in a set of product gases,then the energy involved in the decomposition of $1 \, \text{mole}$ of $A_2B_{(g)}$ is:
$A_2B_{(g)} \to A_{2(g)} + B_{(g)}; \Delta H^o = 40 \, \text{kJ/mol}$
$A_2B_{(g)} \to A_{(g)} + AB_{(g)}; \Delta H^o = 50 \, \text{kJ/mol}$
$A_2B_{(g)} \to A_{2(g)} + B_{(g)}; \Delta H^o = 40 \, \text{kJ/mol}$
$A_2B_{(g)} \to A_{(g)} + AB_{(g)}; \Delta H^o = 50 \, \text{kJ/mol}$
Medium
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