Q. No.
Q.10 Among the following which one causes more indoor chemical pollution?
1. Burning coal
2. Burning mosquito coil
3. Burning cooking gas
4. Room spray
The green scum seen in the freshwater bodies is
1. blue-green algae
2. red algae
3. green algae
4. Both (a) and (c)
Q.12 The loudness of a sound that a person can withstand without discomfort
is about
1. 150 dB
2. 215 dB
3. 30 dB
4. 80 dB
Q.13 The major source of noise pollution, worldwide is due to
1. office equipment
2. transport system
3.sugar, textile, and paper industries
4. oil refineries and thermal power plants
Match correctly the following and choose the correct option :
| A. | Environment Protection Act | 1. | 1974 |
| B. | Air Prevention and Control of Pollution Act | 2. | 1987 |
| C. | Water Act | 3. | 1986 |
| D. | Amendment of Air Act to include noise | 4. | 1981 |
The correct matches are
| A | B | C | D | |
| 1. | 3 | 4 | 1 | 2 |
| 2. | 1 | 3 | 2 | 4 |
| 3. | 4 | 1 | 2 | 3 |
| 4. | 3 | 4 | 2 | 1 |
Q.15 Catalytic converters are fitted into automobiles to reduce the emission of harmful gases. Catalytic converters change unburnt hydrocarbons into
1. carbon dioxide and water
2. carbon mono oxide
3. methane
4. carbon dioxide and methane
Why is it necessary to remove sulfur from petroleum products?
| 1. | To reduce the emission of sulfur dioxide in exhaust fumes |
| 2. | To increase the efficiency of automobiles engines |
| 3. | To use sulfur removal from petroleum for commercial purposes |
| 4. | To increase the life span of engine silencers |
Q.17 Which one of the following impurities is easiest to remove from waste
water?
1. Bacteria
2. Colloids
3. Dissolved solids
4. Suspended solids
Which one of the following diseases is not due to contamination of water?
1. Hepatitis-B
2. Jaundice
3. Cholera
4. Typhoid
Nuisance growth of aquatic plants and bloom-forming algae in natural
water is generally due to high concentrations of
1. carbon
2. sulfur
3. calcium
4. phosphorus
© 2024 GoodEd Technologies Pvt. Ltd.