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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
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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
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
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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