Question

The more commonly used baking powder contains about $30$ starch which of the following statement are correct?
(A) $Ca{{\left( {{H}_{2}}P{{O}_{4}} \right)}_{2}}$ Is acidic and when moistened it react with $NaHC{{O}_{3}}$ evolving $C{{o}_{2}}$ gas.
(B) $NaAl{{\left( S{{O}_{4}} \right)}_{2}}$Slows down the decomposition reaction of $NaHC{{O}_{3}}$so that so that $C{{o}_{2}}$is evolved more slowly.
(C) $NaAl{{\left( S{{O}_{4}} \right)}_{2}}$ is acidic and when moisturized it react with $NaHC{{O}_{3}}$ evolving $C{{O}_{2}}$
(D) Both (a) & (b)

Answer 1

As we known that solution baking powder is a mixture of $NaHC{{O}_{3}}$ ,starch, $Ca{{\left( {{H}_{2}}PO4 \right)}_{2}}\And \text{ }NaAl{{\left( S{{O}_{4}} \right)}_{2}}$ . Baking powder is a chemical which is used to bake the dough in baking industries, homes etc. So baking powder has a large number of applications in day to day life.

Complete step by solution:
When baking powder mixture, added to dough’s firstly $Ca{{\left( {{H}_{2}}P{{O}_{4}} \right)}_{2}}$ i.e. dehydrogen phosphate act as an acid .The function of acid is to release the proton $\left( {{H}^{+}} \right)$ to start he reaction. When the liquid ingredients of dough are added dihydrogen phosphate donates a proton to the bicarbonate to carbonic acid$\left( {{H}_{2}}C{{O}_{3}} \right)$ After then carbonic acid decomposed into baking powder is a mixture of $NaHC{{O}_{3}}$, starch $Ca{{\left( {{H}_{2}}PO4 \right)}_{2}}\And \text{ }NaAl{{\left( S{{O}_{4}} \right)}_{2}}$. Baking powder is a chemical which is used to bake the dough in baking industries, homes etc. So baking powder has a large number of applications in day to day life .
Water and Carbon Dioxide
${{H}_{2}}C{{O}_{3}}\to {{H}_{2}}O+C{{O}_{2}}$
The gaseous $C{{O}_{2}}$ help to bake the dough.
Here$Na\text{ }Al\left( S{{O}_{4}} \right)$ slows down the decomposition reaction of the decomposition reaction of$NaHC{{O}_{3}}$so that $C{{O}_{2}}$evolved slowly.

Option D is the correct answer.

Note: Baking powder is a heterogeneous mixture of various components. Mixture is defined as when two or more substances are added without losing their identity. Mixture is further divided into two kinds
Homogeneous mixture:- A homogeneous mixture is a mixture in which the composition is uniform throughout the mixture. The salt water is homogeneous because the dissolved salt is evenly distributed throughout the entire salt water sample.
Heterogeneous mixture:- A heterogeneous mixture is a mixture in which the composition is not uniform throughout the mixture. Vegetable soup is a heterogeneous mixture.