General Science/Everyday Science MCQs
Topic Notes: General Science/Everyday Science
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
111
The main purpose of the Article 6.2 registry service approved at COP29 is to:
Answer:
Issue and track ITMOs
The UNFCCC Secretariat can provide interoperable registry services to countries for international carbon transfers under Article 6.2. ([IISD](https://www.iisd.org/articles/insight/baku-conference-sets-new-collective-climate-finance-goal?utm_source=chatgpt.com "Baku Conference Sets New Collective Climate Finance Goal"))
112
Which outcome best describes COP29 finance reactions?
Answer:
est describes COP29 finance reactions?
While the USD 300 bn target marked progress, many argued it remained below needs and lacked clarity on grant-based shares. ([Carbon Brief](https://www.carbonbrief.org/cop29-key-outcomes-agreed-at-the-un-climate-talks-in-baku/?utm_source=chatgpt.com "COP29: Key outcomes agreed at the UN climate talks in Baku"))
113
The BBNJ/High Seas Treaty achieved how many ratifications by June 2025?
Answer:
49
A mid-2025 wave of ratifications pushed the count to 49, with advocates urging states to reach 60 for entry into force. ([High Seas Alliance](https://highseasalliance.org/2025/06/09/huge-wave-of-ratifications-for-high-seas-treaty-marks-historic-progress-towards-entry-into-force/?utm_source=chatgpt.com "HUGE WAVE OF RATIFICATIONS FOR ..."))
114
During the CBAM transition (to end-2025), importers must primarily:
Answer:
Report embedded emissions
The transitional phase builds data systems and methodologies ahead of paid compliance from 2026 onward. ([EcoVadis](https://ecovadis.com/regulations/carbon-border-adjustment-mechanism-cbam/?utm_source=chatgpt.com "Carbon Border Adjustment Mechanism (CBAM) | EU Import ..."))
115
Which of these is **true** of the Nature Restoration Law implementation outlook (2024–2025)?
Answer:
Implementation by Member States is key to meeting 2030/2040/2050 milestones
Analysts emphasize that ambitious targets require robust national plans and funding to deliver real ecosystem recovery. ([CAN Europe](https://caneurope.org/content/uploads/2024/09/Nature-Restoration-Law-Essential-Progress-in-Biodiversity-and-Climate-Action-Implementation-will-be-key-v2-1.pdf?utm_source=chatgpt.com "Nature Restoration Law: Essential Progress in Biodiversity ..."))
116
Which plastics-treaty issue most divided negotiators in 2024–2025?
Answer:
Whether to cap plastic production and chemicals of concern
A core split was upstream production limits versus focusing on waste management and design standards, contributing to Geneva’s collapse. ([IISD Earth Negotiations Bulletin](https://enb.iisd.org/plastic-pollution-marine-environment-negotiating-committee-inc5.2-summary?utm_source=chatgpt.com "Summary report 5–15 August 2025 - Earth Negotiations Bulletin"))
117
Brazil’s 2025 clean-power milestone occurred as which resource dipped to a four-year low share?
Answer:
razil’s 2025 clean-power milestone occurred as which resource dipped to a four-year low share?
Hydro’s reduced output created space met by rising wind and solar—collectively exceeding one-third of generation in August 2025. ([AP News](https://apnews.com/article/13eef596389803e8b801f26e7888fb97?utm_source=chatgpt.com "Wind and solar power fuel over one-third of Brazil's electricity for first time"))
118
In 2025, which factor most constrained scale-up of low-emissions hydrogen, per IEA?
Answer:
Project cancellations and cost gaps vs. fossil H₂
The IEA cited cancellations, higher electrolyser prices, and cheap fossil alternatives delaying final investment decisions. ([Reuters](https://www.reuters.com/sustainability/climate-energy/iea-cuts-2030-low-emissions-hydrogen-production-outlook-by-nearly-quarter-2025-09-12/?utm_source=chatgpt.com "IEA cuts 2030 low-emissions hydrogen production outlook by nearly a quarter"))
119
Which statement best reflects 2024 energy-system trends summarized by IEA in 2025?
Answer:
est reflects 2024 energy-system trends summarized by IEA in 2025?
IEA’s 2025 Global Energy Review covers 2024 data and confirms accelerating additions in renewables amid mixed fossil trends. ([IEA](https://www.iea.org/reports/global-energy-review-2025?utm_source=chatgpt.com "Global Energy Review 2025 – Analysis - IEA"))
120
The High Seas Treaty signature period closes on:
Answer:
20 Sep 2025
The agreement opened for signature on 20 Sep 2023 and remains open for two years at UN Headquarters in New York. ([United Nations Treaty Collection](https://treaties.un.org/PAGES/ViewDetails.aspx?chapter=21&clang=_en&mtdsg_no=XXI-10&src=TREATY&utm_source=chatgpt.com "Conservation and Sustainable Use of Marine Biological ..."))