Q551. Identify the incorrect statement regarding the residential architecture at Kalibangan during the Mature Harappan phase.
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Q552. According to the Citizenship Amendment Act (CAA), 2019, illegal migrants belonging to the specified six minority communities from the three specified countries will not be treated as illegal migrants if they entered India on or before:
Explanation
To be eligible for the benefits provided by the Citizenship Amendment Act, 2019, individuals from the specified minority communities and countries must have entered India on or before December 31, 2014. Those who meet this criteria and have been living in India since their entry are no longer treated as "illegal migrants" and are eligible to apply for Indian citizenship fast-track.
Q553. The following question consists of two statements, Assertion (A) and Reason (R). Choose the correct option.
Assertion (A): Environmental Impact Assessment (EIA) is often viewed as a vital tool for achieving sustainable development.
Reason (R): EIA integrates environmental considerations into the planning and design stages of a project, preventing severe ecological damage and subsequent costly remedial measures.
Assertion (A): Environmental Impact Assessment (EIA) is often viewed as a vital tool for achieving sustainable development.
Reason (R): EIA integrates environmental considerations into the planning and design stages of a project, preventing severe ecological damage and subsequent costly remedial measures.
Explanation
EIA is a fundamental tool for sustainable development because it forces the integration of environmental health into economic planning. By predicting potential damage during the design phase, projects can be modified to be less harmful. This proactive approach prevents the loss of natural capital and avoids the high costs of cleaning up pollution after a project is built. Consequently, EIA helps ensure that development does not come at an unacceptable environmental cost.
Q554. The combining capacity of an element with other elements is fundamentally determined by its:
Explanation
Valency is the measure of an element’s combining capacity with other atoms when forming chemical compounds or molecules. It is fundamentally determined by the number of electrons in the atom’s outermost shell, known as valence electrons. Atoms tend to gain, lose, or share these electrons to achieve a stable electronic configuration, typically resembling that of the nearest noble gas in the periodic table.
Q555. Consider the following statements about the drainage system at Kalibangan:
I. It relied extensively on baked bricks for street drains, perfectly identical to Mohenjodaro.
II. Hollowed-out wooden logs were used in some places as drains.
III. Soakage jars were frequently buried in the streets to collect wastewater from houses.
Which of the above statement(s) is/are correct?
I. It relied extensively on baked bricks for street drains, perfectly identical to Mohenjodaro.
II. Hollowed-out wooden logs were used in some places as drains.
III. Soakage jars were frequently buried in the streets to collect wastewater from houses.
Which of the above statement(s) is/are correct?
Explanation
The drainage system at Kalibangan was unique and somewhat different from other major sites. While it lacked extensive baked brick street drains, it utilized innovative methods such as hollowed-out wooden logs to channel water. Additionally, soakage jars or pits were frequently buried in the streets to collect wastewater from individual houses. These adaptations show how communities modified engineering based on local resources.
Q556. Which of the following best describes the primary objective of the Citizenship Amendment Act, 2019?
Explanation
The primary objective of the Citizenship Amendment Act, 2019, is to provide a legal path to Indian citizenship for religious minorities from Afghanistan, Bangladesh, and Pakistan who fled their home countries due to religious persecution. By amending the definition of "illegal migrant" for these specific groups, the Act enables them to seek naturalisation and integrate into Indian society more easily.
Q557. In the context of EIA, "Post-project monitoring" ensures that:
Explanation
Post-project monitoring is the final phase of the EIA process, designed to ensure that the developer actually carries out the environmental safeguards promised during the assessment. It involves regular audits and inspections to verify that pollution levels remain within limits and that mitigation measures are effective. This ongoing oversight is essential for holding industries accountable and for protecting the environment throughout the operational life of the project.
Q558. In the modern periodic table, elements are arranged in increasing order of their:
Explanation
The modern periodic table organizes chemical elements based on their increasing atomic number, which is the number of protons in an atom’s nucleus. This arrangement, established by Henry Moseley, replaced earlier versions based on atomic mass. By using atomic numbers, elements with similar electronic configurations and chemical properties fall into the same vertical columns, known as groups, revealing clear periodic trends.
Q559. Identify the correct pair regarding the artifacts and their significance at Kalibangan.
Explanation
The discovery of a cylindrical seal at Kalibangan is a significant find that points toward international trade. While most Harappan seals are square, the cylindrical form is characteristic of contemporary Mesopotamia. This artifact provides strong evidence that the inhabitants of Kalibangan were part of a vast trade network that connected the Indus Valley with the civilizations of the Near East during antiquity.
Q560. An ionic bond is formed by the:
Explanation
An ionic bond is a type of chemical link formed through the complete transfer of one or more electrons from one atom to another. This typically occurs between a metal and a non-metal. The atom that loses electrons becomes a positively charged cation, while the atom that gains them becomes a negatively charged anion. The strong electrostatic attraction between these oppositely charged ions holds them together.Answer key for these questions
| Q | Correct answer |
|---|---|
| 551 | (c) The entrance to the houses was generally from the main arterial streets |
| 552 | (c) 31 December 2014 |
| 553 | (a) Both A and R are true and R is the correct explanation of A. |
| 554 | (c) Valency |
| 555 | (b) II and III only |
| 556 | (d) Grant citizenship to persecuted minorities from three specific countries. |
| 557 | (d) Implementing mitigation measures. |
| 558 | (d) Atomic number |
| 559 | (c) Cylindrical seal - Suggests trade contacts with Mesopotamia |
| 560 | (c) Complete transfer of one or more electrons from one atom to another |
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.