The threshold limit of benzene is
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Which of the following is/are inorganic gas (es)?
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The permissible concentration of PM 10 in the air is
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Which of the following is a secondary air pollutant?
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The minimum size of smoke particle is
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X ray films are a source of which of the following gas?
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Which are the sources of arsenic pollution?
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Which of the following is a source for boron air pollution?
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Which is the major source for sulphur dioxide?
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Which is the largest source for production of nitrous oxide?
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Which of the following are sources to fluorine air pollution?
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At what concentration can the taste and smell of sulphur dioxide be detected?
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