9,654 RAS Prelims practice MCQs with the correct answer and a clear explanation for each. Filter by subject and chapter.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
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RAS PrelimsHealth, Environment and Agriculture · Biodiversity, Conservation and Sustainable Development
Q3901. Read the following statements and select the correct option: Statement I: Endemic species are those that are found exclusively in a particular geographical area and nowhere else. Statement II: High endemism is a primary requirement for a region to be declared a biodiversity hotspot.
Explanation
Endemic species are restricted to a specific geographical area and are not naturally found elsewhere. High endemism is one of the two mandatory criteria used to identify global biodiversity hotspots. Therefore, both statements accurately describe the nature of endemism and its fundamental role in determining which regions of the world require urgent and prioritized conservation attention from environmental agencies.
RAS PrelimsRajasthan History, Art and Culture · Rajasthan in the 18th and 19th Centuries
Q3902. Identify the incorrect statement regarding the internal conflicts among Rajput states in the 18th century.
Explanation
Internal conflicts in the eighteenth century were exacerbated by succession disputes and shifting allegiances of the nobility. While these issues invited Maratha and Pindari interventions, the Rajput clans failed to forge strong internal unity to counter external threats like Amir Khan Pindari. Instead, the lack of cooperation led to state bankruptcy and the further erosion of the rulers’ central political authority.
RAS PrelimsAncient Indian History · Ancient Indian Art, Architecture and Science
Q3903. Aryabhata, a pioneer of ancient Indian mathematics, is credited with establishing the rules for which of the following operations?
Explanation
Aryabhata was a foundational figure in ancient Indian mathematics who introduced several revolutionary concepts. Beyond his astronomical observations, his mathematical contributions included precise methods for finding the square and cube roots of numbers. These procedures, detailed in his treatise, demonstrated an advanced understanding of arithmetic and algebra that formed the basis for later developments in the field.
RAS PrelimsIndian Polity and Governance · Union-State Relations
Q3904. Through the 42nd Amendment Act of 1976, which of the following subjects was transferred from the State List to the Concurrent List?
Explanation
The 42nd Amendment Act of 1976 transferred five subjects from the State List to the Concurrent List to ensure better national coordination. These subjects included education, forests, weights and measures, protection of wild animals and birds, and administration of justice. This shift allows the Union to formulate national policies on environmental conservation while states retain the power to implement local regulations.
Q3905. Which of the following is NOT considered a greenhouse gas?
Explanation
Greenhouse gases are characterized by their ability to absorb and emit infrared radiation, trapping heat in the atmosphere. Common examples include carbon dioxide, methane, and nitrous oxide. Nitrogen, which makes up about 78% of the atmosphere, does not have this property due to its simple diatomic structure. Therefore, it does not contribute directly to the greenhouse effect or global warming.
RAS PrelimsHealth, Environment and Agriculture · Biodiversity, Conservation and Sustainable Development
Q3906. Which among the following best describes the ecological significance of a biodiversity hotspot?
Explanation
Biodiversity hotspots are biogeographic regions that serve as significant reservoirs of biodiversity. They are defined by the presence of a vast number of endemic species and the fact that the natural habitat is under extreme threat from human exploitation. These areas are prioritized for conservation because they represent the most biologically rich yet most endangered ecosystems on the planet today.
RAS PrelimsAncient Indian History · Ancient Indian Art, Architecture and Science
Q3907. The Amaravati Stupa, situated in the lower Krishna valley, is most famous for its intricate marble sculptures. Under which of the following dynasties did it receive its most significant patronage and structural embellishment?
Explanation
The Amaravati Stupa, located in present-day Andhra Pradesh, underwent several phases of development and became a major center for Buddhist art. While its origins may date back earlier, it received its most significant structural embellishments and elaborate marble carvings during the rule of the Satavahana dynasty. This period saw the stupa reach its height of artistic and architectural grandeur.
RAS PrelimsIndian Polity and Governance · Union-State Relations
Q3908. Which of the following represents the correct descending sequence of the three legislative lists based on the original number of subjects specified in the Seventh Schedule of the Constitution of India?
Explanation
Originally, the Seventh Schedule of the Constitution contained 97 subjects in the Union List, 66 subjects in the State List, and 47 subjects in the Concurrent List. This descending sequence reflects the prioritisation of national authority and the broad range of administrative responsibilities given to the states. Over time, amendments have modified these numbers, but the relative hierarchy of the lists remains.
iii. Combating land degradation and desertification
D. UNCCD
iv. Legally binding emission targets for developed nations
Select the correct answer from the codes given below:
Explanation
The Montreal Protocol addresses ozone depletion, while the Kyoto Protocol established binding targets for developed nations. The Paris Agreement introduced a bottom-up approach through self-determined contributions. The United Nations Convention to Combat Desertification focuses on land degradation. Understanding these different frameworks is essential for recognizing how the international community addresses diverse environmental challenges through specialized legal and cooperative mechanisms.
RAS PrelimsHealth, Environment and Agriculture · Biodiversity, Conservation and Sustainable Development
Q3910. What is a direct ecological consequence of habitat destruction in a biodiversity hotspot?
Explanation
Habitat destruction in biodiversity hotspots is particularly devastating because these areas contain endemic species that exist nowhere else. When their unique habitats are lost, these species face immediate extinction. Consequently, the degradation of these critical regions leads directly to an accelerated loss of global biodiversity, as the specialized life forms they support cannot survive in significantly altered environments.
Answer key for these questions
Q
Correct answer
3901
(c) Both Statement I and Statement II are correct.
3902
(c) Internal unity among the Rajput clans was strongly forged to counter the threat of Amir Khan Pindari.
3903
(c) Extraction of square and cube roots
3904
(c) Wildlife and bird protection.
3905
(c) Nitrogen (N2)
3906
(c) A region with high species richness, endemism, and threat of destruction.
3907
(d) Satavahana dynasty
3908
(d) Union List, State List, Concurrent List
3909
(a) A-ii, B-iv, C-i, D-iii
3910
(d) Accelerated rate of local and global species extinction
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.
Are these actual RAS Prelims past-paper questions?
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.
