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Environmental Engineering in CE

Environmental Engineering in CE
Acute danger to human life (i.e. death) exists, if the concentration of CO₂ in atmospheric air exceeds __________ percent (by volume).

3
20
7
1

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Environmental Engineering in CE
Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.

100-200
10-100
100-1000

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Environmental Engineering in CE
Direct reaction of unsaturated hydrocarbons with either NO or NO₂ produces an eye irritating pollutant compound known as

Benzopyrene
Poly acrylonitrile
Peroxy acetyl nitrate (PAN) or methyl nitrile
Photochemical smog

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Environmental Engineering in CE
World environment day is observed every year on the 5th of

June
December
July
September

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Environmental Engineering in CE
The maximum CO₂ is emitted into the atmosphere by

Biomass burning
Combustion
Urea
Trees

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Environmental Engineering in CE
H₂S present in gaseous stream can be removed by adsorption on

Limestone powder
Bog iron
Silica gel
Active carbon

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