Practice question

How does the ADR classify Class 2 gases based on their primary and subsidiary hazards?

  1. By letters representing their physical and chemical properties (e.g. A, O, F, T)
  2. By numerical division numbers 2.1, 2.2, and 2.3
  3. By their packing groups I, II, and III
  4. By their color codes in the shipping containers

Answer: A — By letters representing their physical and chemical properties (e.g. A, O, F, T)

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