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Question
This air pollutant ______ also called a laughing gas is lethal to human beings at exposure to 100 ppm or more.
Options
NO (Nitric Oxide)
NO2 (Nitrogen di Oxide)
N2O (Nitrous Oxide)
N2O3 (Dinitrogen Trioxide)
MCQ
Fill in the Blanks
Solution
This air pollutant N2O (Nitrous Oxide) also called a laughing gas is lethal to human beings at exposure to 100 ppm or more.
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