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
71
Which country produces the most Gold annually?
Answer:
China
China has been the world's largest gold producer for several years, followed closely by Australia and Russia.
72
Polymetallic nodules, a future potential resource for manganese and cobalt, are found:
Answer:
On the deep ocean floor (Abyssal plains)
These are rock concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core.
73
The 'Three Gorges Dam', the world's largest power station by installed capacity, harnesses which resource?
Answer:
Water (Hydroelectric)
The Three Gorges Dam spans the Yangtze River in China and is the largest hydroelectric power plant in the world.
74
Which resource is formed from the remains of ancient marine organisms (plankton)?
Answer:
Petroleum (Oil)
While coal comes from ancient swamp vegetation, oil and natural gas are formed from the remains of ancient marine organisms like plankton and algae subjected to heat and pressure.
75
OPEC stands for:
Answer:
Organization of the Petroleum Exporting Countries
OPEC is an intergovernmental organization of 13 nations that coordinates petroleum policies to ensure the stabilization of oil markets.
76
Which country is the largest producer of Platinum Group Metals (PGMs)?
Answer:
South Africa
South Africa dominates the global supply of platinum, possessing the vast majority of the world's known reserves in the Bushveld Igneous Complex.
77
Gallium and Indium, used in touchscreens and LEDs, are largely byproducts of mining:
Answer:
Zinc and Aluminum
These critical technology metals are rarely found in their own deposits; they are usually retrieved during the processing of Zinc and Bauxite (Aluminum) ores.
78
Which energy source is derived from organic material such as wood, crops, and waste?
Answer:
Biomass
Biomass energy is generated from living or recently living organisms (plant and animal material) which can be burned or converted into biofuels.
79
Coltan is a conflict mineral essential for electronics (capacitors). Which country holds the majority of its reserves?
Answer:
Democratic Republic of the Congo
The DRC holds significant reserves of Coltan (columbite-tantalites), and its extraction has been linked to conflict funding in the region.
80
The 'Black Earth' or 'Chernozem' soil, highly fertile for agriculture, is most famously found in:
Answer:
Ukraine and Russia
Chernozem is a black-colored soil containing a high percentage of humus and phosphoric acids, creating a 'breadbasket' region in Ukraine and Russia.