Q571. Which unique medico-surgical evidence was identified in a child’s skull found in a Kalibangan burial?
RAS Prelims MCQ Practice
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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Q572. A coordinate covalent (dative) bond is one in which:
Explanation
A coordinate covalent bond, also known as a dative bond, is a specific type of covalent link where the shared pair of electrons is provided entirely by one of the two atoms. The donor atom must have a lone pair of electrons, while the acceptor atom usually has a vacant orbital to accommodate the pair. Once formed, it is indistinguishable from a standard covalent bond.
Q573. Consider the following statements regarding the burial practices at Kalibangan:
I. Extended burials in rectangular pits were common.
II. Circular pits containing large urns (pot burials) were found.
III. Some pot burials contained only grave goods with absolutely no skeletal remains.
IV. Burials uniformly contained massive caches of gold ornaments.
Which of the above statement(s) is/are correct?
I. Extended burials in rectangular pits were common.
II. Circular pits containing large urns (pot burials) were found.
III. Some pot burials contained only grave goods with absolutely no skeletal remains.
IV. Burials uniformly contained massive caches of gold ornaments.
Which of the above statement(s) is/are correct?
Explanation
Burial customs at Kalibangan were diverse and included extended inhumation in rectangular pits as well as pot burials in circular pits. Interestingly, some of these pot burials contained only grave goods and no skeletal remains, possibly representing symbolic funerals. However, the claim that burials uniformly contained gold ornaments is incorrect, as most graves featured common items like pottery and beads.
Q574. Electronegativity is defined as the tendency of an atom to:
Explanation
Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons toward itself within a covalent bond. Atoms with high electronegativity pull electrons more strongly than atoms with lower values. This unequal sharing leads to the formation of polar bonds and influences the overall polarity and reactivity of the resulting molecule in chemical reactions.
Q575. Which of the following burial practices was NOT observed at the Kalibangan cemetery?
Explanation
The cemetery at Kalibangan revealed three main types of burial: rectangular pits with skeletons, circular pits with urns, and rectangular pits containing only pottery. These reflect varied social or ritual practices. However, there is no evidence for the use of Towers of Silence or Dakhma exposures. Such practices are associated with Zoroastrianism, which emerged much later in history than Harappans.
Q576. Which of the following molecules has a nonpolar covalent bond?
Explanation
A nonpolar covalent bond occurs when electrons are shared equally between two atoms of the same element, as they have identical electronegativity. In a nitrogen molecule, the two nitrogen atoms share three pairs of electrons equally, resulting in no partial charges. In contrast, molecules like water and ammonia have polar bonds because their different atoms have varying strengths of attraction for the shared electrons.
Q577. The pottery found alongside the dead in Kalibangan burials primarily serves as evidence for:
Explanation
The inclusion of pottery and other personal items in the graves at Kalibangan is a significant indicator of ancient religious beliefs. These grave goods were likely provided for the use of the deceased in the afterlife. This practice suggests that the Harappan society held complex views regarding death and the continuation of existence, necessitating the provision of essential items for the journey.
Q578. Match the substances in List I with their dominant bond type in List II.
| Substance | Dominant Bond Type |
|---|---|
| A. Potassium Chloride (KCl) | i. Metallic bond |
| B. Methane (CH 4 ) | ii. Ionic bond |
| C. Copper wire (Cu) | iii. Coordinate bond (includes) |
| D. Ammonium ion (NH4 + ) | iv. Covalent bond |
Explanation
Potassium chloride is an ionic compound formed by electron transfer. Methane features covalent bonds where electrons are shared between carbon and hydrogen. Copper wire exhibits metallic bonding with a sea of delocalized electrons. The ammonium ion is notable for containing a coordinate covalent bond, where the nitrogen atom donates an electron pair to a hydrogen ion. These examples highlight the major bonding categories.
Q579. Read the following statements regarding the burial customs at Kalibangan and select the correct option:
Statement I: The presence of pot burials without any skeletal remains at Kalibangan suggests symbolic burials for individuals who died elsewhere.
Statement II: Kalibangan society practiced rigid uniformity, meaning every individual received exactly the same number of pots in their grave.
Statement I: The presence of pot burials without any skeletal remains at Kalibangan suggests symbolic burials for individuals who died elsewhere.
Statement II: Kalibangan society practiced rigid uniformity, meaning every individual received exactly the same number of pots in their grave.
Explanation
The presence of pot burials at Kalibangan without skeletal remains suggests a symbolic funerary practice, perhaps for those who died away from home. However, it is incorrect to assume a rigid uniformity in burial practices. The number and type of pots varied between individual graves, likely reflecting differences in social status, wealth, or personal choice, demonstrating a non-homogenous burial ritual.
Q580. The pH scale is a measure of the concentration of which ions in a solution?
Explanation
The pH scale is a logarithmic measure used to specify the acidity or basicity of an aqueous solution. It is fundamentally based on the molar concentration of hydrogen ions present in the liquid. Solutions with a high concentration of hydrogen ions have a low pH and are acidic, while those with a low concentration have a high pH and are considered basic or alkaline.Answer key for these questions
| Q | Correct answer |
|---|---|
| 571 | (d) Trepanation (making a surgical hole in the skull) |
| 572 | (d) One atom donates both electrons to the shared pair |
| 573 | (b) I, II and III only |
| 574 | (b) Attract a shared electron pair in a covalent bond |
| 575 | (c) Tower of Silence (Dakhma) exposures |
| 576 | (c) N₂ |
| 577 | (d) Belief in an afterlife where grave goods would be utilized |
| 578 | (a) A-ii, B-iv, C-i, D-iii |
| 579 | (c) Statement I is correct but Statement II is incorrect. |
| 580 | (a) Hydrogen ions (H+) |
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.