Question

Baking powder contains:
A.$NaHC{O_3},Ca{\left( {{H_2}P{O_2}} \right)_2}$ and starch
B.$NaHC{O_3},Ca{\left( {{H_2}P{O_2}} \right)_2}$
C.$NaHC{O_3}$, starch
D.$NaHC{O_3}$

Answer 1

Hint: Baking powder is used to add to food before cooking and baking, in order to produce carbon dioxide and create a rise. It contains baking soda. Both baking soda and baking powder are used under different situations. They are both leavening agents.

Complete answer:
Baking powder is dry in nature. It is a mixture of carbonate or bicarbonate and a weak acid. Cornstarch is a buffer. The premature reaction between acid and base is prevented by adding this buffer. Baking powder releases carbon dioxide gas into the batter or dough. This happens due to the acid base reaction. Bubbles are produced in the wet mixture and the mixture expands.
Baking powder tastes a little bit bitter. It is not toxic. But it is not eaten in powder form and it is added to make it to mix with other ingredients.
Baking powder contains 20.8 percent of the daily recommended value of sodium. A teaspoonful of baking powder has zero calorie value. It also provides little calcium in our diet.
Baking powder contains 30 percent of sodium bicarbonate that is $NaHC{O_3}$, 5 to 12 percent of monocalcium phosphate that is $Ca{\left( {{H_2}P{O_2}} \right)_2}$ and starch.

Therefore, the correct option is A.

Note:
Baking powder also contains 21 to 26 percent of sodium aluminium sulphate.There are two types of baking powder. They are single acting and double acting. Double acting baking powder releases some of the gas just after the wet and dry ingredients come along with each other. Then the oven heat or the griddle helps to release still more. Hence commercial baking powders are mostly all double acting baking powder.