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Q. _________ is a by product of sewage treatment & can be decomposed to produce biogas
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Q. How much noise is produced when man breathes?
Q. The radiation initially produced in fluorescent tube is
Q. The greenish yellow colour is seen on a hard boiled egg. This is due to
Q. Why are the inner lining of hot water made up of copper?
Q. Cooking oil can be converted into vegetable ghee by the process of
Q. Which among the given is the 2nd largest source of global energy -
Q. An example of major air pollutant is
Q. Which of the following one of the following does not contain Silver -
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