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Water samples with BOD values of 4 ppm and 18 ppm, respectively are :
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Taj Mahal is being slowly disfigured and discoloured. This is primarily due to :
3
JEE Main 2019 (Online) 11th January Evening Slot
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The higher concentration of which gas in air can cause stiffness of flower buds?
4
JEE Main 2019 (Online) 11th January Morning Slot
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Peroxyacetyl nitrate (PAN), an eye irritant is produced by :
Questions Asked from Environmental Chemistry (MCQ (Single Correct Answer))
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