Q3791. The Supreme Court of India imposed a blanket ban on mining activities in the Aravalli range in which state(s) to protect its ecology?
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Q3792. Given below are two statements, one is labelled as Assertion (A) and the other as Reason (R):
Assertion (A): The Indira Gandhi Canal Project has brought green revolution to western Rajasthan but also created environmental issues.
Reason (R): Intensive canal irrigation without proper drainage has led to widespread waterlogging and soil salinity in the command area.
Assertion (A): The Indira Gandhi Canal Project has brought green revolution to western Rajasthan but also created environmental issues.
Reason (R): Intensive canal irrigation without proper drainage has led to widespread waterlogging and soil salinity in the command area.
Explanation
A massive irrigation project has transformed large parts of a previously dry region, allowing for successful farming and economic growth. However, this progress has also brought new environmental challenges. Because the water is applied intensively to soil that does not drain well, it can lead to the ground becoming saturated and salty. This change makes it difficult for crops to grow and can eventually lead to the loss of productive land if not managed properly.
Q3793. Sambhar Lake, a critical ecosystem in Rajasthan, has faced severe ecological threats recently due to:
Explanation
A large and unique inland salt lake in western India is facing multiple environmental challenges. The intensive extraction of salt and the expansion of human settlements have disrupted the natural flow of water and harmed the local wildlife, particularly migratory birds. Additionally, the illegal occupation of surrounding land has reduced the size of the lake and its sensitive wetlands. These pressures threaten the long-term health of an ecosystem that is of international importance.
Q3794. Match List I with List II regarding Ramsar sites in India:
| Ramsar Site in India | State |
|---|---|
| A. Keoladeo National Park | i. Kerala |
| B. Chilika Lake | ii. Manipur |
| C. Loktak Lake | iii. Odisha |
| D. Vembanad Kol Wetland | iv. Rajasthan |
Explanation
India is home to many wetlands that are recognized for their global ecological importance. These sites are found in diverse landscapes, from the coastal regions of the south and east to the freshwater lakes in the mountains of the northeast and the bird sanctuaries in the dry northern plains. Each of these areas provides essential services such as water filtration, flood control, and habitat for a wide variety of plant and animal species.
Q3795. According to the Ramsar Convention, which of the following is NOT classified as a wetland?
Explanation
According to the international agreement for protecting sensitive water-dominated ecosystems, many different areas can be identified as important. This includes inland lakes, rivers, and marshes, as well as coastal areas like coral reefs. However, there is a specific limit for the depth of open ocean water that can be included. Any area where the water is deeper than six meters at low tide is generally not considered to be a wetland.
Q3796. The Montreux Record is a register of wetland sites on the List of Wetlands of International Importance where:
Explanation
As part of an international effort to protect significant wetlands, a specific list is maintained for sites that are facing serious environmental threats. These areas are identified because human activities or other factors have caused, or are likely to cause, a significant change in their natural ecological state. Being on this list allows for focused attention and resources to be directed toward restoring the health of these sensitive ecosystems and ensuring their survival.
Q3797. Which of the following Ramsar sites in India is famous for floating phumdis?
Explanation
A unique freshwater lake in northeastern India is famous for large masses of vegetation, soil, and organic matter that float on its surface. These natural structures, which can be thick enough to support houses and wildlife, are a critical part of the local ecosystem. The lake provides a habitat for a variety of species, including a rare and endangered type of deer that is only found in this specific area, making it a conservation site.
Q3798. Wetlands are often referred to as "Nature’s Kidneys" because they:
Explanation
Wetlands are often described by a term that reflects their vital role in maintaining the health of the environment. Much like a specific human organ, these areas act as a natural filtration system for the planet. As water moves through the dense vegetation and soil of a marsh or swamp, many harmful pollutants and sediments are trapped and broken down. This process ensures that the water that eventually flows out is much cleaner.
Q3799. Which day is celebrated globally as World Wetlands Day, commemorating the adoption of the Ramsar Convention?
Explanation
Every year, a special day is set aside to raise global awareness about the importance of wetlands for people and the planet. This event commemorates the anniversary of the adoption of the first international treaty for the conservation of these sensitive ecosystems. By celebrating this day, communities around the world can learn about the many benefits that wetlands provide, such as providing fresh water, protecting coastlines, and supporting an incredible variety of biodiversity.
Q3800. In Rajasthan, apart from Keoladeo National Park, which is the other recognized Ramsar site?
Explanation
In addition to a famous national park known for its bird life, another large and unique water body in western India is recognized for its international ecological significance. This inland salt lake is one of the largest in the country and provides a critical habitat for many species of migratory birds. Its inclusion on the global list of important wetlands highlights the need for careful management to protect its natural values from external pressures.Answer key for these questions
| Q | Correct answer |
|---|---|
| 3791 | (b) Haryana and Rajasthan |
| 3792 | (a) Both A and R are true and R is the correct explanation of A. |
| 3793 | (d) Salt extraction and illegal encroachments |
| 3794 | (c) A-iv, B-iii, C-ii, D-i |
| 3795 | (b) Marine waters over six meters deep |
| 3796 | (d) Likely changes in ecological character |
| 3797 | (a) Loktak Lake |
| 3798 | (c) Purify water by trapping pollutants |
| 3799 | (a) 2nd February |
| 3800 | (d) Sambhar Lake |
Frequently asked questions
How many RAS Prelims practice MCQs are there on RAS Prelims?
This page has 9654 practice MCQs on the RAS Prelims syllabus. Each has the correct answer, and most have an explanation.
How should I practise MCQs for RAS Prelims?
Attempt each question first, then open the answer and read the explanation. Practise one chapter at a time, note the facts you got wrong and revise them. Repeat the chapter after a few days.
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No. These are practice questions written for the RAS Prelims syllabus. They follow the pattern the exam uses: factual questions, statement-based questions, match-the-list and assertion-reason.