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907 Questions Page 4 of 37
76
Consider the following statements about the Mpemba Effect:

  1. It refers to the phenomenon in which hotter water freezes faster than colder water under certain conditions.
  2. The Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) has used supercomputers to develop a simulation of ice formation that demonstrates the Mpemba Effect in water.
  3. It is named after Tanzanian student Erasto Mpemba, who brought renewed attention to the phenomenon in 1969.
  4. Aristotle, Robert Hooke and René Descartes had noted similar observations earlier.
  5. The relaxation of materials following sudden temperature changes is technically referred to as an out-of-equilibrium phenomenon.

How many of the above statements are true?
OPSC Prelims 2025 General Science & Technology
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77
Consider the following statements with respect to the Pygmy Hog (Porcula salvinia):

  1. It is the rarest species of wild pig.
  2. It inhabits the tall, dense, wet alluvial grasslands of the southern foothills of the Himalayas.
  3. It is classified as a Critically Endangered species on the IUCN Red List.
  4. Its conservation was initiated by a trust founded by Gerald Durrell.

How many of the above statements are correct?
OPSC Prelims 2025 Environment & Ecology
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78
Under whose Prime Ministership was the nomenclature of the 'Prime Minister's Secretariat' changed to the 'Prime Minister's Office'?
OPSC Prelims 2025 Indian Polity & Governance
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79
In which Article of the Constitution of India is the 'Doctrine of Estoppel' found?
OPSC Prelims 2025 Indian Polity & Governance
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80
Which of the following provisions of the Constitution of India override Fundamental Rights in respect of Article 14 (Right to Equality) and State-level economic redistribution?
OPSC Prelims 2025 Indian Polity & Governance
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81
India integrates biodiversity finance with development planning.
This best reflects which of the following?
OPSC Prelims 2025 Environment & Economics
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82
Consider the following statements regarding the outcomes of COP30:

  1. The Belém Package focuses primarily on setting new binding emission targets.
  2. The Global Mutirão Agreement prioritises implementation over ambition.
  3. The Just Transition Mechanism includes legally guaranteed financial commitments.
  4. The Global Implementation Tracker is intended to assess alignment with the 1.5°C pathway.

Which of the statements given above are correct?
OPSC Prelims 2025 Environment & International Conventions
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83
With reference to cyclones, consider the following statements:

  1. Cyclones form when sea surface temperature exceeds 27°C.
  2. High-pressure zones initiate cyclones.
  3. Wind spirals inward towards the low-pressure centre.
  4. Cyclones move towards regions of higher pressure.
  5. Cyclones derive energy from ocean heat.

Which of the above statements are correct?
OPSC Prelims 2025 Geography
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84
Consider the following statements regarding aquatic organisms:

  1. Plankton are small organisms that float in water.
  2. Nekton includes organisms that actively swim in water.
  3. Benthos are organisms that live suspended in the water column.

Which of the statements given above is/are correct?
OPSC Prelims 2025 Environment & Ecology
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85
Examine the following statements:

Statement-I: The courts are prohibited from inquiring into the advice given by the Ministers to the Governor.
Statement-II: The Ministers have no legal responsibility as per the constitutional provisions.

In the above context, which one of the following is correct?
OPSC Prelims 2025 Indian Polity & Governance
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86
The opening of the college in Cuttack took place in which year?
OPSC Prelims 2025 History & Culture of Odisha
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87
The Mahalwari system in Odisha was introduced in which district?
OPSC Prelims 2025 History & Economy of Odisha
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88
Who confessed, "The defeats of many Billies and Braithwaites will not destroy them. I can ruin their resources by land, but I cannot dry up the sea"?
OPSC Prelims 2025 History of India
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89
Who said, "The Arab invasion of Sindh is a triumph without results"?
OPSC Prelims 2025 History of India
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90
Consider the following statements about education policy and learning outcomes in India and Odisha:

  1. NEP 2020 recommends the home language/mother tongue as the medium of instruction until at least Grade 5, but Odisha faces challenges due to the multiplicity of tribal languages.
  2. Odisha's Mo School Abhiyan has been successful in mobilizing alumni funds for infrastructure, but studies show a weak correlation between infrastructure and learning outcomes without pedagogical reform.
  3. ASER 2023 for Odisha shows that while enrollment remains high (more than 95%), the proportion of Class 3 children who can read a Class 2-level text has declined compared to pre-COVID levels.
  4. Odisha's Sikhsa Sahayata Yojana provides scholarships for higher education to SC/ST/OBC students, but renewal requires 75% attendance, which is difficult for wage labourers.

How many of the above statements are correct?
OPSC Prelims 2025 Education & Social Sector
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91
Consider the following major ports of the world and match them with their correct functional classification:

List-I: PortList-II: Functional Type
(a) Maracaibo, Venezuela1. Entrepot Port
(b) Rotterdam, Europe2. Oil Port
(c) Kochi, India3. Ports of Call
(d) Aden, Yemen4. Naval Port

Select the correct answer using the code given below:
OPSC Prelims 2025 Human & Economic Geography
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92
With reference to the World Trade Organization (WTO), consider the following statements:

  1. Its headquarters are located in Geneva, Switzerland.
  2. As of December 2024, it has 166 member countries.
  3. India is a founding member of the organization.
  4. It was established in 1945 along with the United Nations system.

Which of the statements given above are correct?
OPSC Prelims 2025 International Relations & Economy
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93
With reference to pipeline transportation of oil, consider the following statements:

  1. In regions such as Europe, Russia, West Asia and India, pipelines are widely used to transport crude oil from oil wells to refineries and ports.
  2. Pipeline networks are generally absent in Central Asian countries due to difficult terrain and political constraints.
  3. Turkmenistan has developed pipeline connectivity extending to Iran and parts of China.

Which of the statements given above is/are correct?
OPSC Prelims 2025 Human & Economic Geography
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94
Match the following Biosphere Reserves with their corresponding year of national designation in India:

List-I: Biosphere ReserveList-II: Year of Designation
(a) Panna, Madhya Pradesh1. 1988
(b) Nanda Devi, Uttarakhand2. 2011
(c) Agasthyamalai, Tamil Nadu and Kerala3. 2009
(d) Cold Desert, Himachal Pradesh4. 2001

Select the correct answer using the code given below:
OPSC Prelims 2025 Environment & Ecology
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95
Consider the following matches with respect to the "Aapki Poonji, Aapka Adhikar" campaign to reclaim unclaimed financial assets:

Unclaimed AssetPortal
1. Bank DepositsUDGAM Portal
2. Insurance ProceedsBima Kiran Portal
3. Mutual Fund InvestmentsMITRA Portal
4. Dividends and SharesSEBI Portal

How many of the above are correctly matched?
OPSC Prelims 2025 Economy & Financial Sector
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96
Consider the following statements with respect to Prashast 2.0:

  1. It is a mobile application launched by the Ministry of Social Justice and Empowerment.
  2. It is designed to screen school children with respect to 20 types of disabilities under the Rights of Persons with Disabilities (RPwD) Act, 2016.
  3. It aims at early screening and intervention and at integrating identified children into the social, behavioural and mainstream educational environment.
  4. Its integration with UDISE+ is pending.

How many of the above statements are true?
OPSC Prelims 2025 Governance & Social Justice
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97
Consider the following statements with respect to the IPCC Assessment Reports:

  1. The IPCC was established by UNEP and WMO.
  2. The IPCC directly enforces emission reductions.
  3. The Fifth Assessment Report highlights rapid warming since the 1950s.
  4. The IPCC provides a scientific basis for policymaking.

How many of the above statements are true?
OPSC Prelims 2025 Environment & Ecology
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98
Consider the following statements regarding desert climate and soils:

  1. Aridisols show significant leaching due to rainfall.
  2. Desert soils are often coarse-textured and well-drained.
  3. Entisols are highly developed soils with multiple horizons.

Which of the statements given above is/are correct?
OPSC Prelims 2025 Geography
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99
Which of the following initiatives launched by the Government of India is NOT directly associated with carbon trading or an emissions-reduction mechanism?
OPSC Prelims 2025 Environment & Ecology
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100
Consider the following statements with respect to the doctrine of "procedure established by law" as provided in the Constitution of India:

  1. It protects against executive action.
  2. It protects against legislative action.
  3. Article 22 was incorporated into the Constitution as an additional safeguard after deliberations in the Constituent Assembly.
  4. In the Bank Nationalisation Case, the Supreme Court adopted its strict interpretation.

How many of the above statements are correct?
OPSC Prelims 2025 Indian Polity & Governance
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