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  • General Studies Test 2
  • Anhydrous CaO may be used to dry
Multiple choice

Anhydrous CaO may be used to dry

  1. H2S gas

  2. NH3 gas

  3. CO2 gas

  4. HCl gas

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anhydrous CaO (quicklime) is a basic drying agent. It reacts with acidic gases, so it can be used to dry basic gases like ammonia (NH3).

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