- 1(current)
Q. No.The major problem with the use of chemicals to control plant diseases and pests is:
1. High cost
2. Ineffectivity against most pathogens
3. Difficulty in production
4. Non-specific nature
Biogas is a mixture of:
| 1. | Methane, Carbon dioxide, and Hydrogen sulfide |
| 2. | Methane, Carbon dioxide, and Ammonia |
| 3. | Methane, Ammonia, and Hydrogen sulfide |
| 4. | Ammonia, Carbon dioxide, and Hydrogen sulfide |
Feedstocks used in the production of biogas can normally include all the following except:
| 1. | Animal waste | 2. | Sewage |
| 3. | Silage | 4. | Wood |
The correct chronology of steps involved in the anaerobic digestion during the production of biogas is:
| 1. | hydrolysis → acidogenesis → acetogenesis → methanogenesis. |
| 2. | hydrolysis → acetogenesis → acidogenesis → methanogenesis. |
| 3. | acetogenesis → acidogenesis → hydrolysis → methanogenesis. |
| 4. | acetogenesis → acidogenesis → methanogenesis → hydrolysis |
Consider the given two statements:
| I: | Methane and power produced in anaerobic digestion facilities can be used to replace energy derived from fossil fuels, and hence reduce emissions of greenhouse gases. |
| II: | In developing countries, simple home and farm-based anaerobic digestion systems offer the potential for low-cost energy for cooking and lighting. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct and II is incorrect.
4. Both I and II are incorrect.
| I. | Step 1 is hydrolysis where complex organic molecules are hydrolysed |  |
| II. | Step 2 is acidogenesis where small organic molecules are converted to fatty acid | |
| III. | Step 3 is acetogenesis | |
| IV. | Step 4 is methanogenesis |
| 1. | Only II and III | 2. | Only I, III and IV |
| 3. | Only I, II and IV | 4. | I, II, III and IV |
Consider the given two statements:
| I: | If biogas is smelled anywhere windows and doors should be opened immediately. |
| II: | The content of toxic hydrogen sulfide has been responsible for serious accidents. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct and II is incorrect.
4. Both I and II are incorrect.
Consider the given two statements:
| I: | Biogas is considered to be a renewable resource. |
| II: | Its production-and-use cycle is continuous. |
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. I is correct and II is incorrect.
4. Both I and II are incorrect.
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Q. No.
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