General Knowledge MCQs
Topic Notes: General Knowledge
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
61
Which UK river, studied for microplastics in 2025, flows through London?
Answer:
Thames River
The Thames River, flowing through London, was found to contain microplastics in 2025 studies, as per web sources. Severn, Trent, and Avon are other UK rivers but less emphasized in these studies, making Thames River the correct choice.
62
Which Venezuelan river is studied in 2025 for connecting two major basins?
Answer:
Caroni River
The Casiquiare River, a natural canal in Venezuela, is studied in 2025 for linking the Amazon and Orinoco basins, as reported in web sources. Orinoco, Caroni, and Apure are part of its system but not the link, making Casiquiare River the correct choice.
63
Which Southeast Asian river flows through six countries into the South China Sea?
Answer:
Mekong River
The Mekong River, approximately 4,350 km, flows through China, Myanmar, Laos, Thailand, Cambodia, and Vietnam into the South China Sea, as per an X post. Irrawaddy, Salween, and Chao Phraya are regional, making Mekong River the correct choice.
64
What is the deep African river flowing into the Atlantic Ocean?
Answer:
Niger River
The Congo River, around 4,700 km, is Africa’s deepest river, flowing into the Atlantic Ocean, as noted in an X post. Nile is longer, Niger and Orange are less deep, making Congo River the correct answer.
65
Which South American river flows through Brazil, Paraguay, and Argentina?
Answer:
Paraná River
The Paraná River, at 4,880 km, flows through Brazil, Paraguay, and Argentina, as listed in an X post. Amazon is larger, Uruguay is shorter, and São Francisco is Brazilian-only, making Paraná River the correct choice.
66
Which river system in Russia and Kazakhstan flows into the Arctic Ocean?
Answer:
Ob-Irtysh River System
The Ob-Irtysh River System, around 5,410 km, flows through Russia and Kazakhstan into the Arctic Ocean, as noted in X posts. Lena is separate, Amur flows to the Pacific, and Ural to the Caspian, making Ob-Irtysh the correct choice.
67
What is China’s second-longest river, known as the cradle of Chinese civilization?
Answer:
Yellow River
The Yellow River, or Huang He, at 5,464 km, is China’s second-longest river and a cultural cradle, as listed in X posts. Yangtze is longer, Huai and Liao are shorter, making Yellow River the correct answer.
68
Which Russian river is one of the longest, flowing into the Arctic Ocean?
Answer:
Yenisei River
The Yenisei River, approximately 5,539 km, is one of Russia’s longest, flowing into the Arctic Ocean, as noted in X posts. Lena is also long, Volga flows to the Caspian, and Amur to the Pacific, making Yenisei River the correct choice.
69
What is the U.S. river system named the most endangered in 2025 due to flood risks?
Answer:
Mississippi River
The Mississippi River, part of a 3,730 km system with the Missouri, was named the most endangered U.S. river in 2025 due to flood relief cuts and severe weather, as per web sources. Colorado, Missouri, and Ohio face issues but are not ranked highest, making Mississippi River the correct choice.
70
Which Chinese river is the longest, flowing into the East China Sea?
Answer:
Yangtze River
The Yangtze River, at 6,300 km, is China’s longest river, flowing into the East China Sea, as listed in an X post. Yellow River is shorter, Pearl River is regional, and Mekong originates elsewhere, making Yangtze River the correct choice.