2. Sample Papers
  3. Railways
  4. General Science & Technology
  5. Pollution of Air and Water

Railways General Science & Technology Pollution of Air and Water Sample Paper Air Pollution Sample Test Paper-20

  • question_answer
    Which is not a green-house gas?

    A)  \[C{{O}_{2}}\]

    B)  \[C{{H}_{4}}\]

    C)  \[{{N}_{2}}O\]

    D)  chlorofluorocarbons

    Correct Answer: C

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