Related Questions

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?
A CO
B SO2
C NOx
D CFC (chloro fluoro carbons)
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.
A 0.05
B 1
C 6.5
D 15
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.
A Acrylic
B Polyester
C Nylon 6:6
D Polypropylene
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
The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is
A Less
B More
C Equal
D May be less or more depending on temperature
A compressor that takes suction at a pressure below atmospheric and discharge against atmospheric pressure is called a __________ pump.
A Sump
B Volute
C Vacuum
D Submerged
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
Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the earth's atmosphere?
A Oxygen and nitrogen
B Nitrogen and carbon dioxide
C Ozone and oxygen
D Water vapor and carbon dioxide
In the earth's atmosphere, the atmospheric pressure ________
A Increases with height
B Decreases with height
C Remains constant with height
D First increases and then decreases with height
At very low temperature, the melting and boiling temperatures become equal. This temperature is
A 373°K
B 273.16°K
C 303°K
D 0°K

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