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Question 1 of 5
1. Question
1 pointsConsider the following statements about Methanol
1. Methanol is a clean-burning fuel that produces zero smog-causing emissions and can improve air quality and related human health issues.
2. It can be produced from renewable sources also.
3. As a high-octane vehicle fuel, methanol offers excellent acceleration and power.
Which of the above statements is/are incorrect?Correct
Only 1 is incorrect.
Methanol can be used as an energy producing fuel, transportation fuel and cooking fuel, cutting down India’s oil import bill by an estimated 20% over the next few years. Unlike CNG, using methanol as a transportation fuel would require minimal alteration in the vehicles.
Methanol is a clean-burning fuel that produces fewer smog-causing emissions — such as sulphur oxides (SOx), nitrogen oxides (NOx) and particulate matter — and can improve air quality and related human health issues.
Methanol is most commonly produced on a commercial scale from natural gas. It can also be produced from renewable sources such as biomass and recycled carbon dioxide. As a high-octane vehicle fuel, methanol offers excellent acceleration and power. It also improves vehicle efficiency.Incorrect
Only 1 is incorrect.
Methanol can be used as an energy producing fuel, transportation fuel and cooking fuel, cutting down India’s oil import bill by an estimated 20% over the next few years. Unlike CNG, using methanol as a transportation fuel would require minimal alteration in the vehicles.
Methanol is a clean-burning fuel that produces fewer smog-causing emissions — such as sulphur oxides (SOx), nitrogen oxides (NOx) and particulate matter — and can improve air quality and related human health issues.
Methanol is most commonly produced on a commercial scale from natural gas. It can also be produced from renewable sources such as biomass and recycled carbon dioxide. As a high-octane vehicle fuel, methanol offers excellent acceleration and power. It also improves vehicle efficiency. -
Question 2 of 5
2. Question
1 pointsConsider the following statements about Agenda 21
1. Agenda 21 is a non-binding action plan of the United Nations with regard to sustainable development.
2. It is a product of the Earth Summit (UN Conference on Environment and Development) held in Rio de Janeiro, Brazil, in 1992.
3. The “21” in Agenda 21 refers to 21 points agreed upon by the member countries to achieve sustainable development.
Which of the above statements is/are correct?Correct
1 and 2 are correct.
Agenda 21 is a non-binding action plan of the United Nations with regard to sustainable development. It is a product of the Earth Summit (UN Conference on Environment and Development) held in Rio de Janeiro, Brazil, in 1992. The “21” in Agenda 21 refers to the 21st century. Its aim is achieving global sustainable development. One major objective of the agenda 21 is that every local government should draw its own local Agenda 21. Since 2015, Sustainable Development Goals are included in the Agenda 2030.Incorrect
1 and 2 are correct.
Agenda 21 is a non-binding action plan of the United Nations with regard to sustainable development. It is a product of the Earth Summit (UN Conference on Environment and Development) held in Rio de Janeiro, Brazil, in 1992. The “21” in Agenda 21 refers to the 21st century. Its aim is achieving global sustainable development. One major objective of the agenda 21 is that every local government should draw its own local Agenda 21. Since 2015, Sustainable Development Goals are included in the Agenda 2030. -
Question 3 of 5
3. Question
1 pointsConsider the following matches of mangrove sites with States they are located in.
1. Subernarekha and Dhamra: Odisha
2. Pulicat and Pichavaram: Tamil Nadu
3. Karwar and Coondapur: Maharahstra
4. Vaitarna and Veldur: Telangana
Select the correct answer codeCorrect
Only 1 is correct.
Mangrove Sites are as follows:
• West Bengal: Sunderbans
• Odisha: Bhaitarkanika, Mahanadi, Subernarekha, Devi, Dhamra, Chilika
• Andhra Pradesh: Coringa, East Godavari, Krishna
• Tamil Nadu: Pichavaram, Muthupet, Ramnad, Pulicat, Kazhuveli
• Karnataka: Coondapur, Dakshin Kannada/Honnavar, Karwar, Mangalore Forest Division
• Maharashtra: Achra-Ratnagiri, Devgarj-Vijay Durg, Veldur, Kundalika Revdanda, Mumbai-Diva, Vikhroli,
Shreevardhan, Vaitarna, Vasai-Manori, MalvanIncorrect
Only 1 is correct.
Mangrove Sites are as follows:
• West Bengal: Sunderbans
• Odisha: Bhaitarkanika, Mahanadi, Subernarekha, Devi, Dhamra, Chilika
• Andhra Pradesh: Coringa, East Godavari, Krishna
• Tamil Nadu: Pichavaram, Muthupet, Ramnad, Pulicat, Kazhuveli
• Karnataka: Coondapur, Dakshin Kannada/Honnavar, Karwar, Mangalore Forest Division
• Maharashtra: Achra-Ratnagiri, Devgarj-Vijay Durg, Veldur, Kundalika Revdanda, Mumbai-Diva, Vikhroli,
Shreevardhan, Vaitarna, Vasai-Manori, Malvan -
Question 4 of 5
4. Question
1 pointsConsider the following statements.
1. Cold water corals, in general, have greater amount of zooxanthellae than warm water corals and does not build reef-like structures.
2. Cold-water corals differ from warm water corals because the former does not contain symbiotic algae for photosynthesis and grow more slowly.
Which of the above statements is/are correct?Correct
Only 2 is correct.
Corals that inhabit the colder deep waters of continental shelves and offshore canyons, ranging from 50 to over 1000m depths lack zooxanthellae and may build reef-like structures or occur solitarily.
Cold-water corals are different from their warm-water counterparts because they do not contain symbiotic algae for photosynthesis and grow more slowly. Cold-water corals obtain all their energy from organic matter and zooplankton, which they catch from the currents drifting past
Cold-water corals can be found over a wide range of latitudes, from tropical to Polar Regions, and from the shallow to the deep seas.Incorrect
Only 2 is correct.
Corals that inhabit the colder deep waters of continental shelves and offshore canyons, ranging from 50 to over 1000m depths lack zooxanthellae and may build reef-like structures or occur solitarily.
Cold-water corals are different from their warm-water counterparts because they do not contain symbiotic algae for photosynthesis and grow more slowly. Cold-water corals obtain all their energy from organic matter and zooplankton, which they catch from the currents drifting past
Cold-water corals can be found over a wide range of latitudes, from tropical to Polar Regions, and from the shallow to the deep seas. -
Question 5 of 5
5. Question
1 pointsZooxanthellae loss in corals largely occur due to
1. Exposure of coral to elevated concentrations of various chemical contaminants
2. High temperature of ocean water and increased sedimentation of ocean bed
Which of the above statements is/are correct?Correct
Both 1 and 2 are correct.
Zooxanthellae is what gives colour to corals and provide them food.
• Bleaching, or the paling of coral colour occurs; when (i) the densities of zooxanthellae decline and (ii) the concentration of photosynthetic pigments within the zooxanthellae fall.
• There are many causes of coral bleaching.
• Major Temperature changes, extreme low tides, tectonic uplift etc. can potentially induce bleaching.
• Moreover, Sedimentation, Fresh Water Dilution, inflow of Inorganic Nutrients (e.g. ammonia and nitrate) etc. too cause the same.Incorrect
Both 1 and 2 are correct.
Zooxanthellae is what gives colour to corals and provide them food.
• Bleaching, or the paling of coral colour occurs; when (i) the densities of zooxanthellae decline and (ii) the concentration of photosynthetic pigments within the zooxanthellae fall.
• There are many causes of coral bleaching.
• Major Temperature changes, extreme low tides, tectonic uplift etc. can potentially induce bleaching.
• Moreover, Sedimentation, Fresh Water Dilution, inflow of Inorganic Nutrients (e.g. ammonia and nitrate) etc. too cause the same.
Leaderboard: 18th Oct 2023 | Prelims Daily with Previous Year Questions
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