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 PrelimsScience and Technology · Basics of Everyday Science
Q341. Match the optical phenomena in List I with their corresponding examples in List II.
Optical Phenomenon
Example/Application
A. Total Internal Reflection
i. Rainbow formation
B. Scattering of light
ii. Twinkling of stars
C. Dispersion of light
iii. Optical fibers
D. Refraction of light
iv. Red color of sun at sunrise
Explanation
Total internal reflection is the principle behind optical fibers. Scattering of light by the atmosphere causes the sun to appear red at sunrise. Dispersion of sunlight by water droplets creates rainbows. The twinkling of stars is caused by atmospheric refraction as light passes through varying air densities. These phenomena illustrate how light interacts with different media to produce distinct visual effects.
RAS PrelimsRajasthan History, Art and Culture · Prehistoric Rajasthan
Q342. Which river system was the primary cradle for the flourishing Chalcolithic cultures of southeastern Rajasthan?
Explanation
The Banas river system served as the primary cradle for the flourishing Chalcolithic cultures in southeastern Rajasthan. Often referred to as the Ahar or Banas culture, these settlements thrived on the fertile plains provided by the river and its tributaries. The availability of water and agricultural land, combined with proximity to copper sources, allowed these communities to develop a complex society.
RAS PrelimsAncient Indian History · Indus Valley Civilisation
Q343. Which of the following pairs of Harappan site and its corresponding river is correctly matched?
Explanation
Many Harappan sites were strategically located along river banks. Kalibangan is situated on the left bank of the now-dry Ghaggar River in Rajasthan. Other major sites were located differently: Harappa was on the Ravi River, Mohenjo-daro was on the Indus River, and Lothal was located near the Bhogavo River, a tributary of the Sabarmati, in Gujarat.
RAS PrelimsIndian Polity and Governance · Framing of the Constitution, Preamble and Citizenship
Q344. Consider the following constitutional concepts derived from the Preamble: I. Sovereign implies India is an independent state and there is no authority above it. II. Socialist indicates a commitment to completely abolish private property. III. Secular means the state gives equal respect to all religions. IV. Democratic signifies that supreme power rests with the people. V. Republic denotes that political sovereignty is vested in a single individual like a monarch. Which of the above combination of statements is correct?
Explanation
‘Sovereign’ means India is an independent state. ‘Secular’ implies the state gives equal respect to all religions. ‘Democratic’ means supreme power rests with the people. However, ‘Socialist’ in India does not mean the complete abolition of private property, and ‘Republic’ means the head of state is elected, not that sovereignty rests in a monarch. Therefore, only statements I, III, and IV are correct.
Q345. The following question consists of two statements: one labeled Assertion (A) and the other labeled Reason (R). Assertion (A): The Arabian Desert is an extremely hot and dry region. Reason (R): It is geographically located under the influence of the subtropical high-pressure belt, which promotes descending dry air. Which of the following is correct in the context of the above statements?
Explanation
The Arabian Desert is a region of extreme heat and aridity. Its climate is primarily governed by its location within the subtropical high-pressure belt. In this zone, air masses consistently descend from higher altitudes. As the air sinks, it warms and its ability to hold moisture increases, which prevents cloud formation and rainfall. This atmospheric dynamic results in persistent desert conditions.
RAS PrelimsIndian Economy · Economic Growth, Development and Sustainable Development
Q346. A major difference between the Millennium Development Goals (MDGs) and the Sustainable Development Goals (SDGs) is that:
Explanation
A fundamental difference between the two sets of goals is their scope of application. The Millennium Development Goals were primarily focused on developing nations, with developed countries providing support. In contrast, the Sustainable Development Goals are universal, applying to all countries regardless of their wealth. This reflects the understanding that sustainability is a global challenge that requires action from every nation.
RAS PrelimsScience and Technology · Basics of Everyday Science
Q347. The power of a lens is measured in:
Explanation
The power of a lens is a measure of its ability to converge or diverge light rays and is mathematically defined as the reciprocal of its focal length in meters. The standard unit for measuring this power is the diopter. A lens with a short focal length has a higher power in diopters, indicating a stronger bending effect on the light passing through it.
RAS PrelimsRajasthan History, Art and Culture · Prehistoric Rajasthan
Q348. Identify the correct statement regarding the Chalcolithic cultures of Rajasthan.
Explanation
The Chalcolithic cultures of Rajasthan represent a fascinating stage of development where traditional and new technologies coexisted. While these societies successfully mastered copper smelting and created various metal tools, they did not abandon their stone-working heritage. Instead, the archaeological record shows a diverse use of both microliths and copper implements, which were utilized for various agricultural, domestic, and hunting activities.
RAS PrelimsAncient Indian History · Indus Valley Civilisation
Q349. The highly polished stone pillar bases and segments, reflecting advanced stone-working technology, are uniquely characteristic of which Harappan site?
Explanation
Dholavira is unique among Harappan sites for its extensive use of stone and advanced masonry. Archaeologists discovered highly polished stone pillar bases and segments there, which indicate a level of stone-working technology not typically seen in the brick-dominated cities of the Indus plains. These architectural elements were likely part of monumental buildings or gateways in the city’s impressive citadel section.
RAS PrelimsIndian Polity and Governance · Framing of the Constitution, Preamble and Citizenship
Q350. Which of the following is the most appropriate description of the essence of ‘Democracy’ as envisaged in the Preamble?
Explanation
The democracy envisaged in the Preamble is primarily an indirect or representative democracy. In this system, the supreme power is exercised by the people through their elected representatives. These representatives are responsible to the people and make laws and policies on their behalf. This ensures that the government is based on the consent of the governed and remains accountable to them.
Answer key for these questions
Q
Correct answer
341
(a) A-iii, B-iv, C-i, D-ii
342
(a) Banas river system
343
(a) Kalibangan - Ghaggar
344
(a) I, III and IV only
345
(a) Both A and R are true and R is the correct explanation of A.
346
(a) Universal application of SDGs.
347
(a) Diopters
348
(d) They are characterized by a diverse coexistence of microliths and copper implements.
349
(d) Dholavira
350
(d) Exercise of supreme power by the people through elected representatives.
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.
