SarkariPYQ

SSC CGL 2022 PYQ — Question 47

SSC CGL - 01 Dec 2022 - Shift 4 • General Awareness • Q47

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Which of the following is soda lime?

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Correct answer: D

Explanation

The correct answer is option 4 i.e. NaOH + CaO

  1. Soda lime is the mixture of calcium oxide (Cao also known as Quick lime)  and sodium or potassium hydroxide (NaoH or KOH Also known as Caustic soda).
  2. It is noncombustible and soluble in water with release of heat. 
  3. Chemical formula: CaHNaO2
  4. It is used in granular form in closed breathing environments, such as general anaesthesia, submarines, rebreathers and recompression chambers.
  5.  It is used in manufacture of gas masks
  6. To remove carbon dioxide from breathing gases to prevent CO2 retention and carbon dioxide poisoning.

Additional detail-

Ca(OH)2 + CaO Slaked lime and quick lime (common name)
KOH + CaO Caustic potash and quick lime 
CaCl2 + CaO Bleaching powder and quick lime.