Q. No.Nuisance growth of aquatic plants and bloom-forming algae in natural waters is generally due to high concentrations of:
| 1. | Carbon | 2. | Sulphur |
| 3. | Calcium | 4. | Phosphorus |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Match the following and choose the correct option.
| Column I | Column II | ||
| A. | Environment Protection Act | i. | 1974 |
| B. | Air prevention & Control of pollution Act | ii. | 1987 |
| C. | Water act | iii. | 1986 |
| D. | Amendment of Air Act to include noise as an air pollutant | iv. | 1981 |
The correct match is :
| Options: | A | B | C | D |
| 1. | iii | iv | i | ii |
| 2. | i | iii | ii | iv |
| 3. | iv | i | ii | iii |
| 4. | iii | iv | ii | i |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Which of the following are commonly used as a bacterial indicator of water pollution?
| 1. | Coliforms | 2. | Shigella |
| 3. | Giardia | 4. | Salmonella |
The green scum seen in the freshwater bodies is:
1. Blue-green algae
2. Red algae
3. Green algae
4. Both 1 and 3
The expanded form of DDT is:
1. Dichloro diphenyl trichloroethane
2. Dichloro diethyl trichloroethane
3. Dichloro dipyridyl trichloroethane
4. Dichloro diphenyl tetrachloroacetate
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Identify the incorrectly matched pair:
|
1. |
Ozone depletion |
DNA damage |
|
2. |
Greenhouse effect |
Increased atmospheric carbon dioxide |
|
3. |
Acid rain |
pH < 5 |
|
4. |
Eutrophication |
Decreased primary productivity |
Match the items in column I and column II and choose the correct option:
| Column I | Column II | ||
| A. | UV | i. | Biomagnifications |
| B. | Biodegradable organic matter | ii. | Eutrophication |
| C. | DDT | iii. | Snow blindness |
| D. | Phosphates | iv. | BOD |
| Options: | A | B | C | D |
| 1. | ii | i | iv | iii |
| 2. | iii | ii | iv | i |
| 3. | iii | iv | i | ii |
| 4. | iii | i | iv | ii |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Which one of the following diseases is not caused due to contamination of water?
| 1. | Hepatitis-B | 2. | Jaundice |
| 3. | Cholera | 4. | Typhoid |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | The presence of Tubifex in a water sample is a good indicator of high quality [non-polluted] of the water sample. |
| Reason (R): | Tubifex is a nematode that cannot survive in water with low dissolved oxygen content. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
© 2024 GoodEd Technologies Pvt. Ltd.