Incorrect statement among the following is:
1. Oxides of sulphur, nitrogen, and carbon are the most widespread air pollutant.
2. pH of drinking water should be between 6.5 and 8.5.
3. Concentration of dissolved oxygen below 6 ppm is good for the growth of fish.
4. Clean water would have a BOD value of less than 5 ppm.
The aromatic compound that is present as particulate among the following is :
1. Benzene
2. Toulene
3. Nitrobenzene
4. Polycyclic hydrocarbons
A non-greenhouse gas is :
1. CO2
2. CH4
3. Chlorofluorocarbons
4. O2
The most abundant hydrocarbon pollutant is :
1. Methane
2. Ethane
3. Propane
4. Butane
When rain is accompanied by a thunderstorm, the pH value of the collected rain water is :
1. Dependent upon the amount of dust in the air.
2. Slightly lower when rainwater is without a thunderstorm.
3. Slightly higher when the thunderstorm is not there.
4. Unaffected by the occurrence of thunderstorms.
Gas that is not a pollutant is :
1. Carbon monoxide
2. Nitrogen peroxide
3. Carbon dioxide
4. Sulphur dioxide
Air pollution from the leakage of methyl isocyanate gas from the union carbide factory in Bhopal caused a major tragedy on:
1. Dec. 2, 1984
2. Dec 15, 1983
3. Dec.10, 1982
4. Dec. 4, 1988
The oxygen present today in the atmosphere-
1. Is a plant product.
2. Came from ozone.
3. Was present in the beginning.
4. Is produced by carbon dioxide.
Photochemical smog formed in congested metropolitan cities mainly consists of :
1. Ozone, SO2, and hydrocarbons.
2. Ozone, PAN, and NO2
3. PAN, smoke and SO2
4. Hydrocarbons, SO2, and CO2
Living in the atmosphere of CO is dangerous because it :
1. Combines with O2 present inside to form CO2
2. Reduces organic matter of tissues.
3. Combines with haemoglobin and makes it incapable to absorb oxygen.
4. Dilutes the blood.