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Option 2 : N2O

  • Nitrous oxide (N2O) is colorless at room temperature and odorless gas.
  • It is commonly used for sedation and pain relief.
  • It is also used as a food aerosol in the preparation of whipping cream.

CO2

Carbon dioxide

N2O

Nitrous Oxide / Laughing gas

H2O

Water

O3

Ozone

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