Related Questions

Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes
A Fading of dyes on textiles
B Corrosion, tarnishing & soiling of metals
C Reduced strength of textiles
D All of the above
Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).
A 0.002
B 0.2
C 1.2
D 4.8
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
A 1000 to 2000
B 3000 to 6000
C 6000 to 9000
D 10000 to 100000
Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.
A 50
B 1000
C 5000
D 10000
Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called
A Thermosphere
B Stratosphere
C Troposphere
D Mesosphere
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.
A [

A.

B. 10-100

B 100-200
C 100-1000
Maximum permissible turbidity in potable water is __________ ppm.
A 1
B 10
C 250
D 1000
If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur.
A 50
B 500
C 1000
D 3000 (i.e. 0.3%)
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
A 5
B 100
C 1000
D 2000
Sulphur Dioxide pollution is indicated by an excessive growth of which of the following?
A Algal Blooms
B Lichens
C Bryophytes
D Protozoa

Next steps