Major component of acid rain is :
1.
2.
3. HCl
4.
Ozone depletion occurs in :
1. Tropospheric pollution.
2. Stratospheric pollution.
3. Air pollution.
4. Photochemical smog.
The incorrect statement about carbon monoxide is-
1. | It reduces the oxygen-carrying ability of blood. |
2. | The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin. |
3. | It is produced due to incomplete combustion. |
4. | It forms carboxyhaemoglobin. |
‘White lung cancer’ is caused by :
1. Asbestos
2. Silica
3. Textiles
4. Paper
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
Acid rain occurs due to the presence of :
1. in the atmosphere
2. in the atmosphere
3. in the atmosphere
4. in the atmosphere
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.
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.
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be :
1. Highly polluted.
2. Poor in dissolved oxygen.
3. Rich in dissolved oxygen.
4. Not suitable for aquatic life.