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 PrelimsRajasthan Geography · Population of Rajasthan: Growth, Density, Literacy and Sex Ratio
Q9481. Given below are two statements, one labeled as Assertion (A) and the other as Reason (R): Assertion (A): The western districts of Rajasthan possess a significantly lower population density compared to the eastern districts. Reason (R): The western region is characterized by the vast Thar Desert, arid climate, and acute scarcity of water resources. Select the correct answer using the codes given below:
Explanation
There is a stark contrast in population density between western and eastern Rajasthan. The western districts are sparsely populated because they encompass the Thar Desert, where extreme temperatures and sandy soil prevail. Additionally, the chronic shortage of water for drinking and irrigation makes large-scale settlement difficult. These environmental constraints directly lead to the much lower density observed in the west.
RAS PrelimsModern Indian History · Science and Technology in Independent India
Q9482. Match the pioneering Indian scientists in List I with the specific field or programme they are most famously associated with in List II.
Scientist
Field/Programme
A. Homi J. Bhabha
i. Agricultural Science and Green Revolution
B. M.S. Swaminathan
ii. Telecommunications Revolution
C. Sam Pitroda
iii. Satellite Technology and ISRO
D. U.R. Rao
iv. Atomic Energy Programme
Explanation
Several scientists played transformative roles in India’s development. Homi J. Bhabha pioneered the atomic energy programme, while M.S. Swaminathan led the agricultural advancements of the Green Revolution. Sam Pitroda was instrumental in the telecommunications revolution during the 1980s. U.R. Rao made significant contributions to satellite technology and headed the space agency during a period of major expansion and successful orbital launches.
RAS PrelimsRajasthan Geography · Population of Rajasthan: Growth, Density, Literacy and Sex Ratio
Q9483. Which of the following districts does NOT have a population density above 400 persons per square kilometer as per the 2011 Census?
Explanation
According to 2011 data, only a few districts in Rajasthan have a population density exceeding four hundred persons per square kilometer. These include Jaipur, Bharatpur, Dausa, and Alwar, which are located in the fertile eastern plains. Jodhpur, despite being a major urban center, has a much larger land area that includes desert regions, resulting in an overall density below this threshold.
RAS PrelimsModern Indian History · Science and Technology in Independent India
Q9484. The tragic death of Dr. Homi J. Bhabha, which dealt a significant blow to India’s early atomic energy programme, occurred in 1966 due to which of the following events?
Explanation
Dr. Homi J. Bhabha, the architect of India’s nuclear programme, died tragically in January 1966. His death occurred when Air India Flight 101 crashed on Mont Blanc in the Alps while he was traveling to an international conference. This sudden loss was a severe setback for the country’s scientific community, as he was a key figure in institutionalizing atomic research.
RAS PrelimsRajasthan Geography · Population of Rajasthan: Growth, Density, Literacy and Sex Ratio
Q9485. Which of the following represents the correct descending order of districts based on their total population in 2011?
Explanation
Based on the 2011 Census, the most populated districts in Rajasthan can be ranked in descending order. Jaipur holds the highest population, followed by Jodhpur in the second position. Alwar and Nagaur follow as the third and fourth most populous districts respectively. This order reflects the concentration of the state’s residents in major administrative, industrial, and agricultural centers across different regions.
RAS PrelimsModern Indian History · Science and Technology in Independent India
Q9486. Which of the following was NOT an initiative or committee associated with the early formative years of the Indian space programme under Vikram Sarabhai?
Explanation
The early years of the Indian space programme focused on basic infrastructure and experimental projects. Initiatives like INCOSPAR, the Thumba equatorial station, and the SITE project for educational broadcasting were foundational. However, NavIC is a much more recent development. It refers to the independent regional satellite navigation system that became operational only in the 21st century, long after Sarabhai’s leadership tenure.
RAS PrelimsRajasthan Geography · Population of Rajasthan: Growth, Density, Literacy and Sex Ratio
Q9487. Given below are two statements: Statement I: Rajasthan currently has a relatively young age structure with a large proportion of its population in the working-age group. Statement II: This demographic setup guarantees automatic and unconditional economic prosperity for the state without any need for skill development. Which of the following is correct?
Explanation
Rajasthan possesses a youthful age structure, meaning a large part of its population is in the productive working-age group. However, this demographic setup does not automatically ensure economic prosperity. Without significant investments in education, vocational training, and skill development, the state cannot fully utilize this workforce. Therefore, economic growth depends on proactive policy interventions rather than just the population’s age.
RAS PrelimsModern Indian History · Science and Technology in Independent India
Q9488. Consider the following statements regarding the structural evolution of the Indian space programme: I. INCOSPAR was established in 1962 under the Department of Atomic Energy. II. The Indian Space Research Organisation (ISRO) was formed in 1969, superseding INCOSPAR. III. The Government of India constituted the Space Commission and established the Department of Space (DOS) in 1972. IV. ISRO was brought under the direct administrative control of the Department of Space in 1972. V. The Department of Space operates under the administrative control of the Ministry of Defence. Which of the above statement(s) is/are incorrect?
Explanation
The Indian space programme underwent significant structural changes to ensure its growth. INCOSPAR was followed by the creation of ISRO in 1969. In 1972, the Government established the Space Commission and the Department of Space to provide specialized oversight. Crucially, the Department of Space reports directly to the Prime Minister, rather than being under the administrative control of the Ministry of Defence.
RAS PrelimsRajasthan Geography · Population of Rajasthan: Growth, Density, Literacy and Sex Ratio
Q9489. Which of the following correctly pairs a demographic indicator with its value for Rajasthan in the 2011 Census?
Explanation
The 2011 Census provides specific figures for Rajasthan’s demographic markers. While the overall literacy rate is around sixty-six percent and the population density is two hundred, the male literacy rate is recorded at seventy-nine point two percent. Additionally, the child sex ratio stands at eight hundred eighty-eight. Accurate knowledge of these specific values is essential for evaluating the state’s development.
RAS PrelimsModern Indian History · Science and Technology in Independent India
Q9490. Consider the following statements regarding the Indian pharmaceutical industry post-independence: Statement I: India is often referred to as the ‘pharmacy of the world’ due to its massive production of affordable generic medicines. Statement II: The transition to the production of affordable generic medicines was heavily facilitated by the Indian Patents Act of 1970, which allowed process patents instead of product patents for pharmaceuticals. Identify the correct statement from the options below.
Explanation
India is widely recognized as the "pharmacy of the world" because it produces a vast quantity of affordable generic drugs. This success was facilitated by the Patents Act of 1970, which allowed for process patents in the pharmaceutical sector. This legal provision enabled Indian companies to innovate manufacturing methods for existing drugs, thereby lowering costs and expanding global healthcare access significantly.
Answer key for these questions
Q
Correct answer
9481
(a) Both A and R are true and R is the correct explanation of A.
9482
(a) A-iv, B-i, C-ii, D-iii
9483
(c) Jodhpur
9484
(d) A commercial airplane crash near Mont Blanc in the Alps
9485
(d) Jaipur, Jodhpur, Alwar, Nagaur
9486
(c) Navigation with Indian Constellation (NavIC)
9487
(c) Statement I is true but Statement II is false.
9488
(b) V only
9489
(b) Male Literacy Rate - 79.2%
9490
(c) Both Statement I and Statement II are correct
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.
