Q251. Which mode of heat transfer does not require any material medium?
RAS Prelims MCQ Practice
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Q252. What environmental factor is considered the primary cause for continuous prehistoric habitation at the Bagor site?
Explanation
The primary reason for the continuous prehistoric habitation at Bagor was its favorable ecological setting. Situated on the banks of the Kothari river, the site offered a perennial source of water and a landscape rich in diverse plant and animal resources. This stable environment supported both hunting-gathering activities and the eventual transition to pastoralism, making it an attractive location for humans.
Q253. Consider the following statements regarding Kalibangan:
I. It was excavated by B.B. Lal and B.K. Thapar.
II. Evidence of an earthquake occurring around 2600 BCE has been found here.
III. Decorative bricks were used in the flooring of a house.
IV. A highly sophisticated stone-lined drainage system was its hallmark.
Which of the combination of statements given above is incorrect?
I. It was excavated by B.B. Lal and B.K. Thapar.
II. Evidence of an earthquake occurring around 2600 BCE has been found here.
III. Decorative bricks were used in the flooring of a house.
IV. A highly sophisticated stone-lined drainage system was its hallmark.
Which of the combination of statements given above is incorrect?
Explanation
Kalibangan is famous for its early agricultural evidence and unique ritual structures like fire altars. Archaeologists discovered decorative bricks and evidence of an early earthquake here. However, while the site had a functional drainage system, it was not characterized by the highly sophisticated stone-lined drainage systems seen in cities like Dholavira; instead, it mostly utilized mud-brick and terracotta pipes.
Q254. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as
Reason (R).
Assertion (A): January 26 was specifically chosen as the date of commencement of the Constitution of India.
Reason (R): It was on this day in 1930 that Purna Swaraj day was celebrated following the resolution of the Lahore Session of the INC.
Reason (R).
Assertion (A): January 26 was specifically chosen as the date of commencement of the Constitution of India.
Reason (R): It was on this day in 1930 that Purna Swaraj day was celebrated following the resolution of the Lahore Session of the INC.
Explanation
January 26 was chosen as the date for the Constitution’s commencement because of its immense historical significance. On this day in 1930, "Purna Swaraj" (Complete Independence) Day was celebrated across India following the resolution passed at the Lahore Session of the Indian National Congress in December 1929. By choosing this date, the framers honored the legacy of the freedom movement.
Q255. The extensive wheat farming observed in the Great Plains of North America is most appropriately linked to which physical characteristic of the region?
Explanation
The extensive wheat farming in the North American Great Plains is directly linked to its geography. The region features vast, flat stretches of land that facilitate large-scale mechanized agriculture. The temperate climate and naturally fertile soils, originally covered by grasslands, provide the ideal conditions for growing cereal crops. This combination of topography and soil quality has made the region a global breadbasket.
Q256. Which of the following is a major economic cause of environmental degradation?
Explanation
Environmental degradation is often caused by market failures where the prices of goods do not reflect their true environmental costs. Specifically, the misallocation of common property resources occurs because they are often available for free. Without proper pricing or ownership, industries have no financial reason to limit pollution or resource use. This leads to excessive consumption and the gradual destruction of the natural environment.
Q257. Absolute zero is mathematically equivalent to which of the following temperatures on the Celsius scale?
Explanation
Absolute zero is the lowest theoretical temperature where all molecular motion ceases. On the Kelvin scale, this point is defined as zero K. To convert this to the Celsius scale, one must subtract two hundred and seventy-three point one five. Therefore, absolute zero corresponds to negative two hundred and seventy-three point one five degrees Celsius, representing the absolute limit of coldness.
Q258. Consider the following statements about burial practices at Bagor:
I. Burials were found within the settlement area.
II. In Phase I, human skeletons were placed in an extended position with east-west orientation.
III. In Phase II, bodies were placed in a flexed (crouched) position.
IV. Grave goods such as meat offerings and copper ornaments accompanied the dead.
V. The site reveals strict segregation of cemeteries outside the habitation boundaries.
Which of the above statement(s) is/are correct?
I. Burials were found within the settlement area.
II. In Phase I, human skeletons were placed in an extended position with east-west orientation.
III. In Phase II, bodies were placed in a flexed (crouched) position.
IV. Grave goods such as meat offerings and copper ornaments accompanied the dead.
V. The site reveals strict segregation of cemeteries outside the habitation boundaries.
Which of the above statement(s) is/are correct?
Explanation
Burial practices at Bagor were conducted within the settlement area. In Phase I, the deceased were laid in an extended east-west position. Phase II saw a shift toward flexed or crouched positions, often accompanied by grave goods like copper ornaments and meat offerings. There was no evidence of segregated cemeteries outside the habitation area, reflecting a close social integration between the groups.
Q259. The Harappans procured copper primarily from which of the following regions?
Explanation
The Harappans acquired copper from both local and international sources. The Khetri mines in Rajasthan were a primary domestic source, while chemical analysis of artifacts suggests that copper was also imported from Magan, which is identified with modern-day Oman. This dual sourcing demonstrates the complexity and reach of the Harappan resource procurement networks across both land and sea routes.
Q260. Identify the correct statement regarding the adoption of the Indian Constitution:
Explanation
On November 26, 1949, the day the Constitution was adopted, only 284 members out of the total 299 members of the assembly were actually present. These 284 members signed the official document. The original Constitution as adopted contained a Preamble, 395 Articles, and 8 Schedules. Note that the Preamble was actually enacted after the rest of the Constitution.Answer key for these questions
| Q | Correct answer |
|---|---|
| 251 | (a) Radiation |
| 252 | (d) Favorable ecological setting near the Kothari river offering reliable water and game |
| 253 | (d) IV only |
| 254 | (a) Both A and R are true and R is the correct explanation of A. |
| 255 | (d) Vast, flat, and fertile temperate grasslands |
| 256 | (d) Market failure leading to the misallocation of common property resources. |
| 257 | (c) -273.15 degrees Celsius |
| 258 | (a) I, II, III, and IV only |
| 259 | (b) Khetri region in Rajasthan and Oman |
| 260 | (b) Only 284 out of 299 members were present to sign the Constitution on 26 November 1949. |
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.