Q2011. Which of the following layers of the Sun is inherently impossible to be directly studied via remote sensing instruments on Aditya-L1?
RAS Prelims MCQ Practice
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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Q2012. By definition, a Lagrange point in space is a position where:
Explanation
These are unique spots in space between two large objects, like the sun and the Earth, where a smaller object can stay in a fixed position. At these points, the pull of gravity from both large bodies perfectly balances the force of the small object’s motion. This creates a stable location that is perfect for placing satellites or observatories that need to stay in one place relative to the planets or the sun, allowing for long-term and continuous observation.
Q2013. What is a key practical effect of Coronal Mass Ejections (CMEs) and solar flares that Aditya-L1 seeks to monitor for Earth’s benefit?
Explanation
Massive explosions of energy from the sun can send powerful clouds of particles toward our planet. When these clouds arrive, they can interfere with the electronics on satellites and even cause problems for power lines on the ground. By monitoring these events, the solar observatory helps provide warnings so that companies can protect their equipment. This is a very practical benefit of the mission, as it helps to keep our global communication and energy systems safe from the sun’s activity.
Q2014. What is the most appropriate overall significance of the Aditya-L1 mission for India’s space programme?
Explanation
The successful launch and operation of this mission represent a major milestone, as it is the country’s first dedicated space observatory for the sun. It places the nation in a small group of spacefaring powers with the ability to conduct long-term solar research from deep space. The data collected will improve our understanding of the sun and help protect our technology from solar storms. This mission is a clear sign of the growing maturity and ambition of the national space program.
Q2015. Which of the following historical texts first propounded the Agnikunda theory for the origin of Rajputs?
Explanation
The Agnikunda theory proposes that four Rajput clans--the Chahamanas, Chalukyas, Paramaras, and Pratiharas--emerged from a sacrificial fire pit. This theory was first mentioned in the epic poem Prithviraj Raso, written by Chand Bardai. It suggests a ritualistic purification or rebirth of these warriors to protect the Vedic religion from foreign invasions and internal chaos.
Q2016. Who among the following is credited with overthrowing the Nanda dynasty and establishing the Maurya Empire?
Explanation
Chandragupta Maurya, with the strategic assistance of his mentor Chanakya, defeated Dhanananda, the last ruler of the Nanda dynasty. This significant victory around 322 BCE led to the establishment of the Maurya Empire. His reign marked the first time most of the Indian subcontinent was unified under a single centralized political authority, replacing regional kingdoms with imperial governance.
Q2017. Which Article of the Constitution of India mandates that there shall be a President of India?
Explanation
Article 52 states there shall be a President of India. This office is the highest constitutional post in the country. The President is the first citizen and represents the nation’s unity and integrity. This provision establishes the titular head of the executive branch within the parliamentary system, serving as the foundation for the Union executive’s formal structure and operations.
Q2018. Which of the following best defines the primary distinction between subsistence agriculture and commercial agriculture?
Explanation
Subsistence agriculture focuses on providing food for the farmer’s family with little surplus for sale. In contrast, commercial agriculture is market-oriented, prioritizing profit through large-scale production. The scale of operation and use of technology often differ, but the fundamental distinction lies in the intended destination and purpose of the harvested produce.
Q2019. Which of the following best defines the concept of fiscal federalism in the Indian context?
Explanation
Fiscal federalism involves the systematic allocation of financial resources and responsibilities among different government levels. This framework ensures that both the Union and the States have the necessary funds to perform their constitutional duties. It is characterized by the structured division of revenue-raising powers and expenditure obligations to maintain overall economic stability and equity.
Q2020. Which of the following nitrogenous bases is a purine found in the DNA double helix?
Explanation
Purines are nitrogenous bases containing a double-ring structure consisting of a six-membered ring fused to a five-membered ring. In the DNA double helix, the two primary purines are adenine and guanine. Adenine pairs specifically with the pyrimidine thymine through hydrogen bonding, ensuring the structural stability and consistent diameter of the genetic material across various biological organisms.Answer key for these questions
| Q | Correct answer |
|---|---|
| 2011 | (d) Solar Core |
| 2012 | (b) Two-body gravity balances centrifugal force. |
| 2013 | (d) Solar weather disrupting satellites and grids. |
| 2014 | (a) Operational deep space solar observatories. |
| 2015 | (b) Prithviraj Raso |
| 2016 | (b) Chandragupta Maurya |
| 2017 | (b) Article 52 |
| 2018 | (b) The proportion of produce consumed by the family versus the proportion produced specifically for sale. |
| 2019 | (b) The division of tax powers and spending duties between different government tiers |
| 2020 | (b) Adenine |
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.