A. By reaction of hydrocarbon & nitric oxide in presence of sunlight
B. Appears only on sunny days
C. Is harmful for crops and trees also besides causing eye irritation & asthma
D. All A., B. & C.
Related Mcqs:
- Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes_________________?
A. Poor visibility due to sky darkening
B. Irritation in eyes
C. Respiratory trouble
D. All A., B. and C. - During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
A. Idle running
B. Acceleration
C. Cruising
D. Deceleration - Catalyst used in the ‘catalytic converter’ employed in automobile exhaust line for complete combustion/oxidation of carbon monoxide, nitrogen oxides and hydrocarbons is__________________?
A. Alumina
B. Platinum
C. Vanadium pentoxide
D. Iron oxide - Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for___________________?
A. Conversion of CO into CO2 in the second compartment
B. Conversion of NOx into N2 and NH3 in the first compartment
C. Oxidation of unburnt hydrocarbon fuel in the second compartment
D. All A., B. and C. - Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes__________________?
A. Blood poisoning
B. Anaemia
C. Nervous system disorder
D. All A., B. & C. - Main pollutant present in automobile exhaust is_________________?
A. CO
B. CO2
C. NO
D. Hydrocarbons - Presence of high concentration of ozone and smog in atmospheric air causes the __________________?
A. Embrittlement & decrease of folding resistance of paper
B. Cracking of rubber products
C. Fading of dye on textiles
D. Damage of electrical insulator on high tension power line - Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?
A. Thermosphere
B. Stratosphere
C. Troposphere
D. Mesosphere - Smog is ______________________?
A. Nothing but black smoke
B. A combination of smoke and fog
C. A liquid particle resulting from vapor condensation
D. A solid particle e.g. fly-ash - Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?
A. Respiratory & lung disease
B. Reduction in plant’s productivity owing to acid rain
C. Corrosion of building materials
D. All A., B. and C.
