Which of the following is the most severe air pollutant ?
Which of the following is the most severe air pollutant ?
A. Hydrocarbons
B. NOx
C. SO2
D. CO
Similar Posts
Tri-sodium phosphate is used in boiler water treatment to reduce____________________?
Tri-sodium phosphate is used in boiler water treatment to reduce____________________?A. Turbidity
B. Caustic embrittlement
C. Suspended silica
D. Dissolved oxygenWhich of the following is a green house gas other than CO2 ?
Which of the following is a green house gas other than CO2 ?A. Methane
B. Nitrous oxide
C. Chlorofluoro carbons (CFC)
D. All A., B. and C.Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?
Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?A. Acts as a green house gas thereby raising earth’s temperature
B. Causes asphyxia
C. Causes increase in sea level
D. Enhances the green house effectThere 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?
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. 15Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?
Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?A. Low amount of excess combustion air
B. Large quantity of excess combustion air
C. Hydrocarbon fuel
D. Pulverised coal as fuelThe widest explosive limit is of _____________, thereby making it the most explosive gas?
The widest explosive limit is of _____________, thereby making it the most explosive gas?A. Acetylene
B. Petrol vapor
C. Hydrogen
D. Carbon monoxide