Bissoy.com
Doctors Medicines MCQs Q&A

Which of the following are the applications of common salt? (i) It is used as preservative. (ii) It is used for manufacture of Na metal and Cl2(g) by electrolysis in molten state. (iii) It is used for manufacture of caustic soda. (iv) It is used for manufacturing baking soda and washing soda by Solvay process.

Which of the following are the applications of common salt? (i) It is used as preservative. (ii) It is used for manufacture of Na metal and Cl2(g) by electrolysis in molten state. (iii) It is used for manufacture of caustic soda. (iv) It is used for manufacturing baking soda and washing soda by Solvay process. Correct Answer All of the above

Explanation:

The common salt/table salt is the composition of NaCl. It can be obtained by purification and vapourisation of sea water or by the reaction of a strong acid (HCl) and strong base (NaOH). It is used as raw products in various chemical industries.

As preservative

  • Sodium chloride has been used to flavour and preserves foods for thousands of years.
  • As a preservative, salt helps to prevent spoilage and helps to keep foods like ready-to-eat meats and cheeses safe to eat.
  • Bacteria cannot survive in salt conditions as water is completely extracted by salt due to its hygroscopic nature. 
  • Salt is also used in fermenting processes for foods like sauerkraut, pickles and kefir.

Manufacture of Na metal

  • Sodium metal and chlorine gas can be obtained with the electrolysis of molten sodium chloride.
  • Electrolysis of aqueous sodium chloride yields hydrogen and chlorine, with aqueous sodium hydroxide remaining in solution.

Manufacture of caustic soda

  • Caustic soda is generated by the electrolysis of sodium chloride solution using one of three cell types: mercury, diaphragm and membrane cells.

Manufacturing baking soda and washing soda

  • The Solvay process results in soda ash (predominantly sodium carbonate (Na2CO3)) from brine (as a source of sodium chloride (NaCl)) and from limestone (as a source of calcium carbonate (CaCO3)).

So, NaCl is used in all of the applications as given.

Additional Information

  • Baking soda is prepared via the reaction of sodium carbonate with carbon dioxide and water.
  • The reaction is:

Na2CO3 + H2O + CO2 → 2 NaHCO3  

Related Questions

Which of the following two statements is correct?   a. The soda commonly used in the kitchen for making tasty crispy pokodas is baking soda. The baking soda is a sodium carbonate.  b. Washing soda is usually used as a cleaning agent for domestic purposes and in glass, soap, paper industries. The washing soda is sodium hydrogen carbonate.
Consider the following statements.
1. Anhydrous Sodium bicarbonate is commonly known as baking sodium (baking soda).
2. Baking soda is used as a fire extinguisher.
3. Bleaching powders are produced in Hasnclaver plant.
Which of these statements is right.
IUPAC name: Common use 1. Acetic acid: Used as food preservative and for cleansing purpose. 2. Esters: Used for bathing and washing clothes 3. Sodium sulphate: Used in various medicines 4. Caustic soda: Used for cleaning, unblocking sinks, drains and toilets Which of the above matching is correct? Choose the correct options: 
Metal 'A' displaces metal 'B' from its salt solution, but not able to displace metal 'C' from its salt solution. Metal 'B' displaces metal 'D' from its salt solution. Which of the following depicts correct order of reactivity of metals. 
A Windows 2000 Server computer named server2 runs numerous 32bit applications and two 16bit applications. Users start the 16bit applications by running APP1.EXE for one application and APP2.EXE for another application. The 16bit applications are configured to run in the separate memory space. You want to create a performance base like chart in the system monitor for all the applications on server2. You add all of 32bit applications and now you want to add two 16bit applications. What should you do?
Solvay process as compared to dual process (i.e. modified Solvay process)
Student A rub solid baking soda on dry litmus paper, B rub metal oxide on dry litmus paper, C dip litmus paper in vinegar, D dip litmus paper in aqueous solution of baking soda. The observations were made by student A, B, C, and D should be- Student Effect on dry red litmus paper Effect on dry blue litmus paper A Color Changed to blue No change B No change Color changed to red C No change Color changed to red D Color Changed to blue       Color changed to red The correct observation was made by the student
Which statement is correct about Faraday’s Laws of Electrolysis? Statement 1: After his extensive investigations on electrolysis of solutions and melts of electrolytes, Faraday published his results during 1833-34 in the form of well known Faraday’s two laws of electrolysis. Statement 2: He used a coulometer (a standard electrolytic cell) for determining the quantity of electricity passed from the amount of metal (generally silver or copper) deposited or consumed. 
Match the following (a) Sodium Hydroxide (i) Vinegar (b) Calcium Oxide (ii) Caustic Soda (c) Acetic Acid (iii) Baking soda (d) Sodium Bicarbonate (iv) Bina Booja Choona
Baking soda is used ______. I. for making baking powder II. in soda-acid fire extinguishers III. to neutralize excess acid in the stomach