Q421. The unique geographical location of Dholavira between two seasonal streams, Mansar and Manhar, necessitated the development of which critical infrastructure?
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Q422. In which of the following cases did the Supreme Court explicitly opine that the "Preamble is not a part of the Constitution"?
Explanation
In the Berubari Union case of 1960, the Supreme Court held that while the Preamble shows the general purpose behind several provisions in the Constitution and is a key to the minds of the makers, it is not an integral part of the Constitution. Therefore, the court concluded that it could not be enforced in a court of law as a source of power.
Q423. In the physiographic division of Rajasthan, the extremely arid region characterized by extensive sand dunes and almost negligible vegetation is locally referred to as:
Explanation
In the physiographic classification of Rajasthan, the "Marusthali" refers to the extremely arid western part of the Thar Desert. This region is characterized by vast stretches of shifting sand dunes, very low rainfall, and minimal vegetation. The name itself signifies the "land of death," reflecting the harsh environmental conditions. It is geologically distinct from the semi-arid steppe regions located further east.
Q424. The "trade-off" debate between climate change and economic development primarily centers around the argument that:
Explanation
The trade-off debate focuses on the tension between achieving rapid economic growth and meeting climate mitigation targets. Developing nations often argue that strict emission limits could hinder their industrialization and poverty reduction efforts. Conversely, ignoring climate change leads to long-term economic damage. Finding a balanced path that allows for "green growth" without sacrificing development goals is a central challenge in modern global policy.
Q425. According to Ohm’s law, at a constant temperature, the current flowing through a conductor is directly proportional to the:
Explanation
Ohm’s law states that for most conductors at a constant temperature, the electric current flowing through them is directly proportional to the potential difference, or voltage, across their ends. This means that increasing the voltage will lead to a corresponding increase in current, provided the resistance remains unchanged. This relationship is a fundamental principle used to analyze and design electrical circuits.
Q426. Select the correct chronological sequence of initial excavations of the following Mewar region Chalcolithic sites:
Explanation
The archaeological exploration of major Mewar Chalcolithic sites followed a specific chronological order. Ahar was first excavated in the early 1950s by Akshay Kirti Vyas. This was followed by B.B. Lal’s excavations at Gilund in 1959-60. Finally, the site of Balathal was systematically excavated starting in the 1990s. This progression of research has continuously refined our understanding of the culture’s depth.
Q427. Which of the following statements about Harappan weights and measures is incorrect?
Explanation
The Harappan weight system was remarkably standardized but followed two different numerical patterns. The lower denominations of weights followed a binary system, while the higher denominations followed a decimal system. These weights were typically made of chert and were cubical in shape. The claim that lower denominations followed a strictly decimal system is therefore inaccurate according to archaeological evidence and research.
Q428. Arrange the following landmark Supreme Court cases related to the legal status of the Preamble in chronological order:
I. Kesavananda Bharati case
II. Berubari Union case
III. LIC of India case
Select the correct order from the options below:
I. Kesavananda Bharati case
II. Berubari Union case
III. LIC of India case
Select the correct order from the options below:
Explanation
The legal status of the Preamble was first addressed in the Berubari Union case in 1960, where it was declared not to be a part of the Constitution. This was reversed in the landmark Kesavananda Bharati case in 1973, which held the Preamble to be an integral part. Later, in the LIC of India case in 1995, the court reaffirmed its earlier decision.
Q429. Match List-I (Features of Thar Desert) with List- II (Description) and select the correct answer using the codes given below:
| Features of Thar Desert | Description |
|---|---|
| A. Barchan | i. Shallow, temporary salt lakes |
| B. Playa | ii. Shifting sand dunes |
| C. Rann | iii. Saline marshy tracts |
| D. Dhrian | iv. Crescent-shaped sand dunes |
Explanation
The Thar Desert contains several unique geomorphic features. Barchans are crescent-shaped sand dunes with horns pointing downwind. Playas are shallow, temporary salt lakes found in basins. The Rann refers to saline marshy tracts, such as the Rann of Kutch. Dhrians are the locally known shifting sand dunes that move across the desert surface. These terms help describe the desert’s complex and dynamic landscape.
Q430. In the context of climate economics, "mitigation" strategies refer to actions designed to:
Explanation
Climate mitigation involves human interventions to reduce the sources or enhance the sinks of greenhouse gases. Strategies include switching to renewable energy, improving energy efficiency in buildings, and protecting forests that absorb carbon. Unlike adaptation, which focuses on managing the impacts of a changing climate, mitigation aims to address the root cause by slowing the rate of global warming itself.Answer key for these questions
| Q | Correct answer |
|---|---|
| 421 | (d) A complex system of dams and large stone water reservoirs. |
| 422 | (d) Berubari Union case (1960) |
| 423 | (d) Marusthali |
| 424 | (d) Growth versus mitigation constraints. |
| 425 | (d) Potential difference across its ends |
| 426 | (a) Ahar Gilund Balathal |
| 427 | (a) Lower denominations followed a strictly decimal measurement system |
| 428 | (a) II, I, III |
| 429 | (a) A-iv, B-i, C-iii, D-ii |
| 430 | (a) Reduce or prevent the emission of greenhouse gases. |
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.