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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RAS PrelimsRajasthan History, Art and Culture · Prehistoric Rajasthan
Q561. Match List-I with List-II regarding archaeological findings and Harappan sites in Rajasthan:
Feature/Finding
Associated Harappan Site
A. Fire altars and ploughed field
i. Kalibangan
B. Substantial use of baked bricks and rich hoards
ii. Baror
C. Late Harappan industrial site with copper focus
iii. Karanpura
D. Seal of a seated deity
iv. Binjor
Explanation
Various Harappan sites in Rajasthan are identified by unique features. Kalibangan is famous for fire altars and its ploughed field. Baror is noted for the substantial use of baked bricks and jewelry hoards. Binjor served as a late Harappan industrial site with a focus on copper, while Karanpura has yielded interesting artifacts like a seal depicting a seated deity.
RAS PrelimsScience and Technology · Basics of Everyday Science
Q562. Which of the following compounds exhibits covalent bonding?
Explanation
Covalent bonding occurs when two atoms share one or more pairs of valence electrons to achieve stability. This typically happens between non-metal atoms. In water, each oxygen atom shares electrons with two hydrogen atoms, forming stable covalent bonds. In contrast, substances like sodium chloride and magnesium oxide are held together by ionic bonds resulting from the transfer of electrons between metals and non-metals.
RAS PrelimsRajasthan History, Art and Culture · Prehistoric Rajasthan
Q563. The discovery of a specific type of seal at Kalibangan, which is cylindrical rather than the typical square Harappan seal, shows the cultural influence of which contemporary civilization?
Explanation
The presence of a cylindrical seal at Kalibangan is a clear indicator of cultural and commercial contact with the Mesopotamian civilization. This specific seal type was common in the cities of Sumer and Akkad but rare in the Indus Valley. Its presence suggests that traders or ideas from the Near East reached the Ghaggar-Hakra region, highlighting the globalized trade networks.
RAS PrelimsScience and Technology · Basics of Everyday Science
Q564. Metallic bonds are generally characterized by a lattice of positive ions surrounded by a "sea" of:
Explanation
Metallic bonding is characterized by a unique structure where positive metal ions are arranged in a rigid lattice. These ions are surrounded by a "sea" of delocalized valence electrons that are free to move throughout the entire solid. This mobility of electrons is responsible for the characteristic properties of metals, such as high electrical and thermal conductivity, malleability, and metallic luster.
RAS PrelimsRajasthan History, Art and Culture · Prehistoric Rajasthan
Q565. The following question consists of two statements, Assertion (A) and Reason (R). Select the correct answer using the codes given below: Assertion (A): The street drainage system at Kalibangan is considered less sophisticated than that of Mohenjodaro. Reason (R): Kalibangan lacked baked brick street drains and primarily utilized soakage pits and hollowed wooden logs for wastewater disposal.
Explanation
The drainage system at Kalibangan is often considered less sophisticated than that of Mohenjodaro because it relied on different building materials. Instead of extensive baked brick street drains, Kalibangan primarily used soakage pits and hollowed-out wooden logs. This variation reflects local environmental constraints and the availability of resources rather than a lack of understanding of sanitation and urban engineering practices.
RAS PrelimsScience and Technology · Basics of Everyday Science
Q566. Consider the following properties of ionic compounds: I. They generally have high melting and boiling points. II. They conduct electricity in the solid state. III. They conduct electricity when dissolved in water. IV. They are typically soluble in non-polar solvents like benzene. Which of the above statement(s) is/are correct?
Explanation
Ionic compounds are characterized by strong electrostatic forces, leading to high melting and boiling points. In their solid state, ions are fixed in a lattice and cannot move, making them poor conductors. However, when dissolved in water or melted, the ions become free to move and conduct electricity. Most ionic compounds are soluble in polar solvents like water but not in non-polar ones.
RAS PrelimsRajasthan History, Art and Culture · Prehistoric Rajasthan
Q567. By definition, Bronze Age tools in the Harappan context are primarily made from an alloy of copper and:
Explanation
In the context of the Harappan civilization, the Bronze Age is defined by the technological advancement of alloying copper with tin. This process created a harder and more durable metal than pure copper, suitable for manufacturing superior tools, weapons, and artistic figurines. The procurement of tin indicates the existence of extensive long-distance trade networks that supported the metallurgical needs of urban society.
RAS PrelimsScience and Technology · Basics of Everyday Science
Q568. Covalent compounds generally have low melting and boiling points because:
Explanation
Covalent compounds consist of individual molecules held together by strong internal covalent bonds. However, the forces acting between these separate molecules, known as intermolecular forces, are relatively weak. When these substances are heated, only a small amount of thermal energy is needed to overcome these weak attractions and separate the molecules, resulting in typically low melting and boiling points compared to ionic compounds.
RAS PrelimsRajasthan History, Art and Culture · Prehistoric Rajasthan
Q569. Which of the following describes a distinct burial practice discovered in the Kalibangan cemetery?
Explanation
One of the primary burial practices discovered in the Kalibangan cemetery is extended inhumation. In this method, the body of the deceased was placed in a rectangular pit, usually in a north-south orientation with the head toward the north. These graves often contained pottery and other personal items, reflecting the community’s beliefs about the afterlife and providing information about the ancient population.
RAS PrelimsScience and Technology · Basics of Everyday Science
Q570. The exceptionally high boiling point of water relative to other similar sized molecules is primarily due to:
Explanation
Water molecules are polar, with oxygen being more electronegative than hydrogen. This creates dipoles that lead to a special type of intermolecular attraction called hydrogen bonding. These bonds are much stronger than typical van der Waals forces. Consequently, significant thermal energy is required to break these attractions and transition water from a liquid to a gas, explaining its unusually high boiling point.
Answer key for these questions
Q
Correct answer
561
(a) A-i, B-ii, C-iv, D-iii
562
(b) Water (H₂O)
563
(d) Mesopotamian
564
(d) Delocalized valence electrons
565
(a) Both A and R are true and R is the correct explanation of A.
566
(a) I and III only
567
(c) Tin
568
(c) Intermolecular forces between molecules are relatively weak
569
(a) Extended inhumation in rectangular pits
570
(a) Hydrogen bonding
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.
