Q411. Identify the odd one out among the following deserts, considering their geographical location within the continent of Asia.
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Q412. Consider the following statements about ecological and carbon footprints:
I. A country has an ecological deficit if its ecological footprint exceeds its biocapacity.
II. Carbon footprint is a sub-component of the total ecological footprint.
III. Earth Overshoot Day marks the date when humanity’s demand for ecological resources in a year exceeds what Earth can regenerate in that year.
IV. An increase in the use of fossil fuels generally decreases the carbon footprint.
Which of the above statement(s) is/are correct?
I. A country has an ecological deficit if its ecological footprint exceeds its biocapacity.
II. Carbon footprint is a sub-component of the total ecological footprint.
III. Earth Overshoot Day marks the date when humanity’s demand for ecological resources in a year exceeds what Earth can regenerate in that year.
IV. An increase in the use of fossil fuels generally decreases the carbon footprint.
Which of the above statement(s) is/are correct?
Explanation
An ecological deficit occurs when a nation’s demand for resources exceeds what its ecosystems can provide. The carbon footprint is a major component of this total footprint, reflecting the land needed to absorb CO2. Earth Overshoot Day marks the point where annual resource use exceeds regeneration. However, increasing fossil fuel use actually raises the carbon footprint rather than decreasing it.
Q413. Select the correct sequence of media arranged in increasing order of the speed of sound through them:
Explanation
The speed of sound depends on the density and elasticity of the medium. Sound travels slowest in gases like air because the molecules are far apart. In liquids like water, the particles are closer, allowing faster transmission. It travels fastest in rigid solids like steel, where strong molecular bonds and high elasticity facilitate the rapid transfer of vibrational energy between adjacent particles.
Q414. Identify the incorrect statement regarding the Ahar people.
Explanation
The Ahar people were skilled metallurgists, and the claim that they were unaware of copper smelting is entirely false. Archaeological evidence, including copper slag and furnaces, confirms that they actively smelted ore to produce tools. They also manufactured characteristic Black and Red Ware pottery, cultivated rice, and produced decorative terracotta beads, showcasing a highly self-sufficient and culturally rich Chalcolithic community.
Q415. Which of the following accurately describes the discovery sequence of the Indus Valley Civilisation?
Explanation
Harappa was the first site of the Indus Valley Civilisation to be scientifically excavated, starting in 1921 under Daya Ram Sahni. This discovery was followed by the excavation of Mohenjo-daro in 1922. Because Harappa was the first site identified, the entire culture is often referred to as the Harappan Civilisation. This sequence was crucial in establishing the antiquity of urbanism.
Q416. Given below are two statements regarding the ideal of ‘Equality’ in the Preamble:
Statement I: The Preamble secures to all citizens equality of status and opportunity.
Statement II: This provision embraces three dimensions of equality: civic, political, and economic.
Identify the correct option:
Statement I: The Preamble secures to all citizens equality of status and opportunity.
Statement II: This provision embraces three dimensions of equality: civic, political, and economic.
Identify the correct option:
Explanation
The Preamble promises all citizens equality of status and of opportunity. This ideal of equality is comprehensive, covering three dimensions. Civic equality is reflected in articles like equality before the law. Political equality is seen in provisions for universal adult franchise. Economic equality is promoted through the Directive Principles, which aim to reduce wealth concentration and ensure a decent standard of living.
Q417. How does the orientation of the Aravalli Range primarily contribute to the aridity of the Thar Desert in Rajasthan?
Explanation
The Aravalli Range plays a critical role in the aridity of the Thar Desert. Its orientation is almost parallel to the direction of the moisture-bearing South-West monsoon winds coming from the Arabian Sea. Because the mountains do not act as a barrier to these winds, the clouds pass over the region without being forced to rise and cool, resulting in negligible rainfall.
Q418. When a nation’s ecological footprint is less than its biocapacity, the nation is said to have an ecological:
Explanation
If a nation’s ecological footprint is smaller than its available biocapacity, it is said to have an ecological reserve. This means the country’s natural ecosystems can produce more resources and absorb more waste than its population currently consumes. Such nations are in a relatively sustainable position, though they may still export their biocapacity to other regions through international trade of natural resources.
Q419. The apparent change in frequency of a sound due to the relative motion between the source and the observer is known as:
Explanation
The Doppler Effect describes the apparent change in the frequency or wavelength of a wave as observed by someone moving relative to the wave source. As a sound source approaches an observer, the waves are compressed, leading to a higher perceived pitch. Conversely, as the source moves away, the waves stretch out, resulting in a lower perceived pitch than the original sound.
Q420. The distinctive Black and Red Ware (BRW) pottery found at Ahar is predominantly decorated with paintings in which color?
Explanation
The distinctive Black and Red Ware (BRW) pottery of the Ahar culture is renowned for its unique manufacturing technique and decoration. These pots were fired in a way that produced a black interior and a red exterior. They were predominantly decorated with delicate linear and geometric patterns painted in white. This aesthetic style is a hallmark of the Banas culture and helps archaeologists.Answer key for these questions
| Q | Correct answer |
|---|---|
| 411 | (c) Mojave Desert |
| 412 | (c) I, II and III only |
| 413 | (a) Air < Water < Steel |
| 414 | (b) They were entirely unaware of copper smelting and imported all finished tools. |
| 415 | (b) Harappa was the first site to be excavated in 1921, giving the civilization its alternative name. |
| 416 | (c) Both Statement I and Statement II are correct |
| 417 | (b) Parallel orientation to the Arabian Sea monsoon |
| 418 | (b) Reserve |
| 419 | (b) The Doppler Effect |
| 420 | (d) White |
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.