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
Potash is a critical resource used primarily for:
Answer:
Fertilizer (Potassium source)
Potash refers to potassium-bearing minerals used in fertilizers to support plant growth.
62
Which agricultural resource is the primary feedstock for Ethanol production in the United States?
Answer:
Corn (Maize)
In the US, corn is the main source for ethanol biofuel. In Brazil, sugarcane is the primary source.
63
The 'Bushveld Igneous Complex' in South Africa is famous for containing the world's largest reserves of:
Answer:
Platinum and Palladium
This unique geological formation contains the world's largest reserves of Platinum Group Metals (PGMs).
64
Which renewable resource uses photovoltaic cells?
Answer:
Solar
Photovoltaic (PV) cells are the technology used in solar panels to convert sunlight directly into electricity.
65
Lignite is often referred to as:
Answer:
Brown Coal
Lignite is the lowest grade of coal with the least concentration of carbon and high moisture content, often called brown coal.
66
Which country has the largest reserves of Iron Ore?
Answer:
Australia
Australia holds the world's largest crude iron ore reserves, followed by Brazil.
67
What is 'Yellowcake'?
Answer:
A concentrate of Uranium oxide
Yellowcake is a type of uranium concentrate powder obtained from leach solutions, an intermediate step in the processing of uranium ores.
68
Which soil type, red in color and rich in iron/aluminum oxides, is common in tropical rainforests but poor for agriculture?
Answer:
Laterite (Latosol)
Laterite soils form in hot, wet tropical areas where intense leaching removes soluble nutrients, leaving high concentrations of iron and aluminum oxides.
69
Helium is primarily obtained as a byproduct of extracting:
Answer:
Natural Gas
Helium is trapped underground with natural gas. The US National Helium Reserve extracts it from gas fields.
70
Saffron, the most expensive spice by weight, is a major resource export of which country?
Answer:
Iran
Iran produces approximately 90% of the world's saffron, derived from the flower of Crocus sativus.