2. Sample Papers
  3. 9th Class
  4. General Knowledge

9th Class General Knowledge Sample Paper General Knowledge Olympiad Model Test Paper-10

  • question_answer
    Electrostatic precipitator is used to control:

    A)  Air pollution                 

    B)  Water pollution

    C)  Noise pollution  

    D)  Solid waste

    E)  None of these

    Correct Answer: A

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