UPSC Prelims 2027 Practice – 15 UPSC Level MCQs
3 October 2026 • Static + Current Affairs • Answers & Explanations
2. It replaces the earlier GDP series based on 2011-12.
3. A base-year revision necessarily means that only prices change while data sources and estimation methods remain unchanged.
4. GST and Periodic Labour Force Survey data are among the improved data sources incorporated in the revised framework.
India's new National Accounts series uses 2022-23 as the base year in place of 2011-12. A base-year revision can also involve improved sources, classification and estimation methodology.
UPSC Trap: Base-year revision is not merely a mechanical price update. Official Source: PIB – New GDP Series2. India has 111 declared National Waterways.
3. All declared National Waterways are currently operational for cargo and passenger movement.
4. Inland waterways can contribute to multimodal logistics and reduce pressure on road and rail transport.
India has 111 declared National Waterways, but only a part of this network is operational for regular cargo and passenger movement.
Declared ≠ operational. Official Source: PIB – National Waterways2. Written advice of the Union Cabinet is required before the President issues such a proclamation.
3. Once approved by Parliament, it continues indefinitely unless revoked.
4. A proclamation of National Emergency may apply to the whole or only a part of India.
Parliamentary approval is required periodically. An Emergency does not continue indefinitely merely because it was once approved.
Approval is time-bound; constitutional emergencies are not open-ended.2. The CAG can be removed in the same manner and on the same grounds as a Judge of the Supreme Court.
3. The salary and service conditions of the CAG may be varied to his or her disadvantage after appointment.
4. The CAG audits expenditure from the Consolidated Fund of India.
Constitutional safeguards protect the independence of the CAG, including security of tenure and protection against disadvantageous variation of service conditions.
2. Wholesale Price Index includes services as a major component.
3. CPI is used as the headline inflation measure for India's inflation-targeting framework.
4. Food items carry weight in the CPI basket.
India's WPI primarily tracks goods rather than a broad basket of services. CPI is central to the flexible inflation-targeting framework.
CPI and WPI differ both in coverage and purpose.2. Import of crude oil
3. Interest received on foreign investments
4. Foreign Direct Investment into an Indian company
Goods, services and investment income are current-account transactions. FDI is recorded in the financial account.
2. Chilika Lake — Odisha
3. Pulicat Lake — Andhra Pradesh and Tamil Nadu
4. Loktak Lake — Assam
Loktak Lake is located in Manipur. The other three pairs are correctly matched.
Map-based elimination remains a high-value Prelims skill.2. They can contribute to groundwater recharge in suitable hydrogeological settings.
3. All wetlands are freshwater ecosystems.
4. Wetlands can serve as important habitats for migratory birds.
Wetlands include freshwater, brackish and saline ecosystems. Their ecological functions include flood moderation, biodiversity support and, in some cases, groundwater recharge.
2. Tropospheric ozone can act as an air pollutant.
3. Ozone depletion and global warming are exactly the same atmospheric phenomenon.
4. Chlorine-containing compounds can participate in catalytic destruction of stratospheric ozone.
Ozone depletion and climate change interact but are distinct environmental problems. Stratospheric ozone is protective, whereas ground-level ozone is harmful.
2. Its orbital period is approximately equal to Earth's rotational period.
3. Polar-orbiting satellites can be useful for Earth observation.
4. Every geosynchronous satellite is necessarily geostationary.
Geostationary orbit is a special type of geosynchronous orbit requiring a circular equatorial orbit and the correct direction of motion.
All geostationary satellites are geosynchronous, but not vice versa.2. RNA generally contains ribose sugar.
3. Uracil commonly replaces thymine in RNA.
4. All RNA molecules in living organisms perform only protein-coding functions.
RNA includes messenger RNA as well as several non-coding forms such as rRNA, tRNA and regulatory RNAs.
2. Non-Cooperation Movement
3. Civil Disobedience Movement
4. Quit India Movement
Swadeshi followed the Partition of Bengal in 1905; Non-Cooperation began in 1920, Civil Disobedience in 1930, and Quit India in 1942.
2. Sattriya — Assam
3. Kuchipudi — Andhra Pradesh
4. Manipuri — Odisha
Manipuri is associated with Manipur, not Odisha. The first three pairs are correctly matched.
2. Permanent members possess veto power on substantive resolutions.
3. All members of the United Nations automatically serve on the Security Council.
4. Non-permanent members are elected for fixed terms.
UN membership does not automatically confer Security Council membership. Non-permanent members are elected by the General Assembly.
2. Rhizobium commonly forms a symbiotic association with leguminous plants.
3. Lightning can contribute to natural nitrogen fixation.
4. Plants can directly absorb atmospheric nitrogen gas through their leaves as their principal nitrogen source.
Most plants obtain nitrogen through compounds such as nitrate and ammonium rather than directly absorbing atmospheric N₂.
Atmospheric nitrogen is abundant, but chemically unavailable to most plants without fixation.