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Automobile exhaust
Forest fire
Bacterial action in soil and swamp areas
All of the above
Which of the following is a monoatomic gas?
Which of the following is a natural polymer?
Which of the following is a non metal that remains liquid at room temperature ?
Which of the following is a radioactive element?
Which of the Following is an Amorphous solid?
Which of the following is caused by the higher concentration of Nitrogen and Phosphorous?
Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?
Which of the following is correct about Ammonia?
Which of the following is correct about Hydrazine?
Which of the following is formed when an acid reacts with an alcohol?