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प्रश्न
Write the chemical name of baking soda. Give the important uses of baking soda. How does baking soda differ chemically from washing soda?
उत्तर
- Baking soda is used in fire extinguishers.
- It is an ingredient, used in preparing baking powder, which is used in baking cakes, breads, etc.
- It is used as an antacid to remove acidity in the stomach.
Washing soda, or sodium carbonate (Na2CO3.10H2O), consists of two sodium atoms attached to a carbonate group with 10 molecules of water of crystallisation, whereas baking soda comprises one atom of sodium and one of hydrogen, attached to a carbonate group. Hence, baking soda (NaHCO3) differs from washing soda (Na2CO3) by one hydrogen atom. When baking soda is heated up at high temperatures, it breaks down to form sodium carbonate, water vapour and carbon dioxide.
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संबंधित प्रश्न
A student takes about 2 mL ethanoic acid in a dry test tube and adds a pinch of sodium hydrogen carbonate to it. He reports the following observations:
I. Immediately a colourless and odourless gas evolves with a brisk effervescence.
II. The gas turns lime water milky when passed through it.
III. The gas burns with an explosion when a burning splinter is brought near it.
IV. The gas extinguishes the burning splinter that is brought near it.
The correct observations are
(A) I, II and III
(B) II, III and IV
(C) III, IV and I
(D) I, II and IV
Give two important uses of baking soda.
Name an acid which is present in baking powder.
Complete and balance the following chemical equations:
`NaHCO_3` 
What is baking soda?
Describe how sodium hydrogencarbonate (baking soda) is produced on a large scale. Write equation of the reaction involved.
Name two constituents of baking powder.
In addition to sodium hydrogencarbonate, baking powders contain a substance X. Name the substance X. What is the role of substance X in the baking powder?
Consider the following substances:
NaCl, Ca(OH)2, NaHCO3, NH3, Na2CO3, H2O, Cl2, CO2, CaSO4.2H2O, 2CaSO4.H2O, CaOCl2
Which compound is a part of baking powder?
(i) Name the products formed when sodium hydrogen carbonate is heated.
(ii) Write the chemical equation for the reaction involved in the above.
