|
|
|
61. |
The abbreviation MPN stand for: |
A. |
Most probable number |
B. |
Millions per night |
C. |
Millennium of probable number |
D. |
None of these |
Answer: Option A
Explanation:
|
62. |
The ground water pollution is due to excess of: |
A. |
DDT is a growth retardant |
B. |
Pesticides |
C. |
Minerals |
D. |
Carbon deposit |
Answer: Option C
Explanation:
|
63. |
Indiscriminate use of fertilizers have lead to: |
A. |
Air pollution |
B. |
Soil pollution |
C. |
Water pollution |
D. |
All of the above |
Answer: Option C
Explanation:
|
64. |
Which of the following is not used for disinfection of drinking water? |
A. |
Chlorine |
B. |
Chloramines |
C. |
Phenyl |
D. |
Ozone |
Answer: Option C
Explanation:
|
65. |
Which of the following is a biodegradable pollutant? |
A. |
Sewage |
B. |
Asbestos |
C. |
Plastic |
D. |
All of these |
Answer: Option A
Explanation:
|
66. |
A very harmful fibrous component causing pollution an inflicting diseases of lungs in human beings: |
A. |
Grease |
B. |
Asbestos |
C. |
Eichhornia roots |
D. |
ABS micelle |
Answer: Option B
Explanation:
|
67. |
With the increase in water pollution, the BOD: |
A. |
Decreases |
B. |
Increases |
C. |
Remains the same |
D. |
Is no measure of pollution |
Answer: Option B
Explanation:
|
68. |
The enrichment of water by nutrients is: |
A. |
Mineralization |
B. |
Oligotrophication |
C. |
Eutrophication |
D. |
All of these |
Answer: Option C
Explanation:
|
69. |
Which of the following is not a commonly used pesticide? |
A. |
Aldrin |
B. |
Lindane |
C. |
Chlordane |
D. |
Chloremphenicol |
Answer: Option D
Explanation:
|
70. |
The most harmful pesticide is: |
Answer: Option D
Explanation:
|
Read more:
|
|