A. Calcium salts
B. Cobalt salts
C. Silicon oil
D. Barium salts
Related Mcqs:
- Major pollutant present in the jet plane emission is:
A. CCI4
B. SO2
C. CO
D. Fluoro-carbon - Nitrogen oxides produced from the emission of automobiles and power plants, are the source of fine air borne particles which lead to:
A. Photochemical smog
B. Dry acid deposition
C. Industrial smog
D. Wet acid deposition - Which major aerosol pollutant is present in jet aircraft emission?
A. SO2
B. Fluoro-carbons
C. CCI4
D. CO - Which of the following pollutant is not the product of automobile exhaust?
A. SO2
B. Fly ash
C. CO
D. Hydrocarbons - Most hazardous metal pollutant of automobile exhaust is:
A. Hg
B. Cd
C. Pb
D. Cu - The light of cities is reduced in comparison to villages due to the presence of:
A. SO2 and SO3
B. SO2 and oxides of nitrogen
C. Hydrocarbons and N2O
D. Suspended particulate matter - Sometimes sound and uninjured seeds may fail to germinate due to reduced activity of the seed or seed parts resulting in blockade of the growth. This may be due to:
A. External effects of environment
B. Internal conditions within the plant itself, i.e. Embryo dormancy or seed coat dormancy
C. Both (a) & (b)
D. None of these - Mechanical tissues and xylem are highly reduced in Hydrilla because:
A. Water provides the support and there is no problem for the absorption and conduction of water
B. Otherwise the weight of these tissues would drown the plant
C. Of the anaerobic conditions created by submergence
D. Otherwise translocation of food would have been interrupted - Soil erosion can be reduced by:
A. Reducing over grazing
B. Planting proper plants
C. Making dams
D. All of those - Himalayan foothills and the Potwar region including ______ are covered with the scrub forests which have been reduced to scanty growth at most of the places:
A. Salt Range
B. Kala Chitta Range
C. Both (a) & (b)
D. None of these
The correct answer to the question: "The automobile emission can be reduced by adding the following in the petrol:" is "Barium salts".
