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  3. 8th Class
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8th Class Science Sample Paper Science Sample Paper-8

  • question_answer
                                                                What are the chemical effects of electric current? Explain with the help of an example.                                    

    Answer:

    Major causes of air pollution are:                                                                                                  
    (i) Emissions from automobile exhaust.
    (ii) Effluents from thermal power plants.
    (iii) Smoke from forest fires, volcanic eruptions etc.


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