Question

Which of the following compounds is known as baking soda?
(A) sodium carbonate
(B) calcium carbonate
(C) sodium bicarbonate
(D) calcium bicarbonate

Answer 1

Hint: There are many important compounds of sodium for industrial purposes which are sodium carbonate, sodium hydroxide, sodium chloride, and sodium bicarbonate. These compounds are produced on a large scale at the industry level and more domestic or industrial applications.

Complete step by step answer:
Some important compounds of sodium are:
(1) Sodium carbonate, $N{{a}_{2}}C{{O}_{3}}$
(2) Sodium hydroxide, $NaOH$
(3) Sodium chloride, $NaCl$
(4) Sodium hydrogen carbonate or sodium bicarbonate, $NaHC{{O}_{3}}$

Sodium bicarbonate: sodium hydrogen carbonate is also called sodium bicarbonate. Because this compound decomposes on heating, generating bubbles of carbon dioxide which is used in the making of cakes or pastries, is known as baking soda.
Sodium bicarbonate is prepared from saturated sodium carbonate reacting with carbon dioxide, the white crystalline powder which is formed is sodium bicarbonate, which is less soluble and gets separated with a density of 2.2 g/mL. it is alkaline in taste and sparingly soluble in water. The solubility of sodium bicarbonate increases with the rising of temperature.
$N{{a}_{2}}C{{O}_{3}}+{{H}_{2}}O+C{{O}_{2}}\to 2NaHC{{O}_{3}}$

Applications of sodium bicarbonate as a component of baking powder, in a fire extinguisher, as a mild antiseptic in medicine, and as a reagent in industry.
Hence, sodium carbonate is known as baking soda. Sodium carbonate is known as washing soda, and calcium carbonate, calcium bicarbonate are the hardness causing salts in water.
So, the correct answer is “Option B”.

Note: The mixture of sulphuric acid and baking soda is known as soda acid, which is used as a fire extinguisher. The soda acid liberated carbon dioxide which cut off the supply air. To bake a cake by baking powder is a mixture of baking soda, calcium dihydrogen phosphate.