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
Through nitrogen fixation process nitrogen in the atmosphere is converted into
A Ammonium
B Hydroxide
C Nitrate
D Chlorite
Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the
A Forestation
B Rain
C Green house effect
D Vegetation
Increase in carbon dioxide in atmosphere causes ________
A Rise in earth temperature
B Fall in earth temperature
C Uniform earth temperature
D Increase in Ultraviolet rays
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
A 5
B 100
C 1000
D 2000
Which of the following is caused by the higher concentration of Nitrogen and Phosphorous ?
A Eutrophication
B Hardness
C Alkalinity
D Acidity
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.
A 1
B 5
C 50
D 500
The higher is the content of carbon dioxide in the air-
A more heat
B it retains
C than it retains more heat
D the more heat it retains
Osmosis is the flow of solution from higher concentration to a solution of lower concentration through a semi permeable membrane. What is incorrect in this statement?
A Exact concentration of solution is not given
B Character of semi permeable membrane is not given
C The flow of solution is not possible through semi permeable membrane
D All are incorrect
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be
A Cooled and humidified
B Cooled and dehumidified
C Heated and humidified
D Heated and dehumidified

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