Chemistry · Rate of a chemical reaction, factors affecting the rate of reactions: concentration, temperature, pressure and catalyst
can be used on its own to make cakes or bread. Baking powder is more commonly us
\( N a H C O_{3} \) can be used on its own to make cakes or bread. Baking powder is more commonly used, and contains \( N a H C O_{3}, C a\left(H_{2} P O_{4}\right)_{2} \) and starch. An improved combination baking powder contains about \( 40 \% \) starch, \( 30 \% \) \( N a H C O_{3} 20 \% N a A l\left(S O_{4}\right)_{2} \) and \( 10 \% \) \( \boldsymbol{C a}\left(\boldsymbol{H}_{2} \boldsymbol{P} \boldsymbol{O}_{4}\right)_{2} \) Answer the following questions based on above study. n improved baking powder, \( N a A l\left(S O_{4}\right)_{2} \) is used for :
- A. makes the decomposition of \( \operatorname{NaH} \mathrm{CO}_{3} \) faster
- B. slows the decomposition of \( N a H C O_{3} \)
- C. acts as filler
- D. makes the bread rise
Step-by-step solution
NaAl(SO4)2 acts as an acidic salt in baking powder. When mixed with water, it reacts with NaHCO3, producing CO2 gas rapidly, which leavens the bread. This reaction accelerates the decomposition of NaHCO3 compared to its slow thermal decomposition alone, making Option A correct.
Related MCQs
- The term -dx/dt in the rate expression refers to:…
- The minus in }{d t} \) indicates the concentration of the time. The rate of a reaction is always quantity. The rate of reaction increases wi…
- According to adsorption theory of catalysis, the reaction rate increases, because:…
- As the concentration of reactants increases:…
- A nuclide undergoes -decay and another nuclide undergoes -decay. Which of the following statements are correct? This question has multiple c…