Which of the following is soda lime?

This question was previously asked in
SSC CGL 2022 Tier-I Official Paper (Held On : 01 Dec 2022 Shift 4)
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  1. Ca(OH)2 + CaO
  2. KOH + CaO
  3. CaCl2 + CaO
  4. NaOH + CaO

Answer (Detailed Solution Below)

Option 4 : NaOH + CaO
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Detailed Solution

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The correct answer is NaOH + CaO.

Key Points

  • Soda-lime is a mixture of Sodium hydroxide(NaOH) and Calcium oxide(CaO).
  • The Chemical formula of the soda lime is CaHNaO2.
  • The main components present in soda-lime are Calcium hydroxide(about 75%), Water(about 20%), Sodium hydroxide(about 3%), and Potassium hydroxide (about 1%).
  • It is mainly used to absorb moisture and gases.
  • Soda-lime is used in gas masks as an absorbent for toxic gases.
  • Soda-lime causes severe damage to the gastrointestinal tract.
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