Q61. Identify the incorrect statement regarding the natural lakes of Rajasthan.
Rajasthan Geography: RAS Prelims MCQs
529 RAS Prelims practice MCQs on the geography of Rajasthan are on this page, in 13 chapters. They cover location, extent and physiography, rivers and lakes, climate, natural vegetation and wildlife, soils, agriculture, livestock, irrigation, minerals, population, urbanisation, tribes and tourism. Each question has an answer and an explanation, in the formats the exam uses.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
Showing 61–70 of 529 questions
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Q62. The declining water level in Pushkar Lake over recent decades is best attributed to which of the following combinations of cause and effect?
Explanation
The decline in water levels at Pushkar Lake is primarily due to human interference in its natural catchment area. Many feeder streams that once supplied water have been diverted or blocked by construction and sand mining. Furthermore, extensive groundwater extraction for agriculture and domestic use in the surrounding region has lowered the water table, reducing the natural inflow and the lake’s retention capacity.
Q63. The Sambhar Lake is the largest inland salt lake in India. Approximately what percentage of India’s total salt production is derived from this lake?
Explanation
Sambhar Lake is India’s largest inland salt lake and a critical site for salt production. It contributes approximately 8.
Q64. Which of the following represents the correct west to east geographical sequence of the given lakes in Rajasthan?
Explanation
Arranging Rajasthan’s lakes from west to east requires tracking their district locations. Pachpadra is in the far west (Barmer), followed by Lunkaransar in the northwest (Bikaner). Moving east, we find Sambhar Lake near the center (Jaipur boundary). Finally, Siliserh Lake is located in the eastern district of Alwar, completing the longitudinal sequence across the state’s diverse and vast geographical landscape.
Q65. Consider the following statements about Sambhar Lake:
I. The Mendha and Rupangarh rivers drain their water into it.
II. The Khari and Khandela rivers are also prominent feeders of this lake.
III. It was designated as a Ramsar Wetland site of international importance in 1990.
IV. Hindustan Salts Limited operates a major salt extraction facility here.
V. According to the Bijolia inscription, the lake was constructed by Vasudev Chauhan.
Which of the above statements is/are correct?
I. The Mendha and Rupangarh rivers drain their water into it.
II. The Khari and Khandela rivers are also prominent feeders of this lake.
III. It was designated as a Ramsar Wetland site of international importance in 1990.
IV. Hindustan Salts Limited operates a major salt extraction facility here.
V. According to the Bijolia inscription, the lake was constructed by Vasudev Chauhan.
Which of the above statements is/are correct?
Explanation
Sambhar Lake is a complex saline ecosystem fed by several rivers like the Mendha and Rupangarh. It is a designated Ramsar site, reflecting its international ecological importance. Managed by Hindustan Salts Limited, it is also historically significant; the Bijolia inscription attributes its construction to Vasudev Chauhan. These factors highlight the lake’s multifaceted role in the state’s economy, history, and environment.
Q66. Which of the following pairs of ‘Salt Lake’ and ‘District’ is correctly matched?
Explanation
Tal Chhapar is a small saline depression located in the Churu district, which is also famous for its Blackbuck sanctuary. While many of Rajasthan’s prominent salt lakes like Sambhar and Didwana are in the central region, Tal Chhapar represents the saline features found in the northern desert area. Other mentioned lakes like Degana and Kuchaman are located in the Nagaur and Didwana-Kuchaman districts respectively.
Q67. A massive mortality event of migratory birds occurred at Sambhar Lake in recent years. What was the scientifically established cause of this ecological disaster?
Explanation
In recent years, Sambhar Lake witnessed a tragic ecological disaster involving the death of thousands of migratory birds. Scientific investigations confirmed that the primary cause was an outbreak of Avian Botulism, a serious neuromuscular illness caused by a toxin produced by the bacterium Clostridium botulinum. This event highlighted the vulnerability of the lake’s ecosystem to changing environmental conditions and biological pathogens.
Q68. Eutrophication, a major ecological issue threatening several freshwater lakes in Rajasthan, is primarily caused by which of the following?
Explanation
Eutrophication in Rajasthan’s freshwater lakes is primarily driven by the excessive influx of nutrients, particularly nitrogen and phosphorus. These nutrients often come from untreated urban sewage and agricultural runoff containing fertilizers. This enrichment leads to the rapid growth of algae, which eventually depletes dissolved oxygen levels. This process severely degrades water quality and threatens the survival of aquatic life in these ecosystems.
Q69. Consider the following lakes in Rajasthan:
I. Fateh Sagar
II. Pichola
III. Ana Sagar
IV. Pushkar
V. Nakki
Which of the above lakes are included in the National Lake Conservation Plan (NLCP) for environmental restoration?
I. Fateh Sagar
II. Pichola
III. Ana Sagar
IV. Pushkar
V. Nakki
Which of the above lakes are included in the National Lake Conservation Plan (NLCP) for environmental restoration?
Explanation
Several major lakes in Rajasthan, including Fateh Sagar, Pichola, Ana Sagar, Pushkar, and Nakki, have been included in the National Lake Conservation Plan. This central government initiative aims to restore the ecological health of urban and semi-urban lakes. Through projects like desilting and sewage treatment, the program seeks to improve water quality and preserve the biodiversity of these important regional sites.
Q70. When addressing the ecological importance of Rajasthan’s lakes, which of the following is an immediate biological consequence of lake eutrophication?
Explanation
An immediate and critical consequence of lake eutrophication is the formation of dense algal blooms on the water’s surface. As these algae die and decompose, the process consumes vast amounts of dissolved oxygen. This depletion creates "dead zones" where fish and other aquatic organisms cannot survive. Consequently, the biodiversity of the lake drops sharply, and the water becomes unsuitable for use.Answer key for these questions
| Q | Correct answer |
|---|---|
| 61 | (b) Siliserh Lake is an important natural saltwater lake situated in the Alwar district. |
| 62 | (d) Feeder streams are diverted and groundwater is extracted in the catchment. |
| 63 | (b) 8.7% |
| 64 | (a) Pachpadra, Lunkaransar, Sambhar, Siliserh |
| 65 | (d) I, II, III, IV and V |
| 66 | (d) Tal Chhapar - Churu |
| 67 | (b) An outbreak of Avian Botulism |
| 68 | (d) High nutrient levels from agricultural runoff and urban sewage. |
| 69 | (d) I, II, III, IV and V |
| 70 | (c) Formation of dense algal blooms that deplete dissolved oxygen |
Key facts from Rajasthan Geography
- The RPSC syllabus lists Rajasthan’s location, extent and physiography, rivers and lakes, climate, vegetation, biodiversity, soils, agriculture, livestock, irrigation, population, urbanisation and tribes.
- Many questions ask for a number or a name: the area of the State, a district’s density, the length of a canal, the home district of a mine.
- Rajasthan is the biggest State of India by area, and several chapters test the contrast between the arid west and the humid south-east.
- Minerals, irrigation and wildlife are the chapters with the most name-based questions, so keep a list of districts and projects.
- Population questions use Census 2011 figures.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Rajasthan Geography?
This page has 529 practice MCQs on Rajasthan Geography. Each has the correct answer, and most have an explanation.
Which chapters does the Rajasthan geography set cover?
Thirteen chapters: location, extent and physiography; rivers and lakes; climate; natural vegetation, biodiversity and conservation; soils; agriculture; livestock and animal husbandry; irrigation; minerals; population; urbanisation; tribes; and tourism.
Is Rajasthan geography in the RAS Prelims syllabus?
Yes. RPSC lists Geography of Rajasthan as a separate part of the syllabus, including location, rivers, climate, vegetation, soil, agriculture, livestock, irrigation, population, urbanisation and tribes, after the world and India sections.
How can I prepare Rajasthan geography quickly?
Keep a Rajasthan map and mark every river, dam, mine, sanctuary and fair that appears. Attempt each chapter, read the explanations and revise the numbers: area, population, density and canal lengths.