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
31
What is 'Symbiosis'?
Answer:
Interaction between two different organisms living in close physical association
Symbiosis is any type of a close and long-term biological interaction between two different biological organisms.
32
What is a 'Photon'?
Answer:
A particle representing a quantum of light
A photon is a type of elementary particle. It is the quantum of the electromagnetic field including electromagnetic radiation such as light.
33
What is 'Oxidation'?
Answer:
The loss of electrons during a reaction
Oxidation is the process when oxygen combines with an element, changing the appearance of the element. In chemical terms, it is the loss of electrons.
34
What is an 'Ecosystem'?
Answer:
A biological community of interacting organisms and their physical environment
An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life.
35
What is 'Viscosity'?
Answer:
The state of being thick, sticky, and semi-fluid in consistency (resistance to flow)
Viscosity is a measure of a fluid's resistance to flow. For example, honey has a higher viscosity than water.
36
What is a 'Light Year'?
Answer:
A unit of distance
A light-year is a unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (the distance light travels in one year).
37
What does 'Absolute Zero' refer to?
Answer:
The lowest temperature that is theoretically possible
Absolute zero is the lowest limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reach their minimum value.
38
What is 'Refraction'?
Answer:
The bending of light as it passes from one medium to another
Refraction is the change in direction of a wave passing from one medium to another or from a gradual change in the medium.
39
What is a 'Hypothesis'?
Answer:
A proposed explanation made on the basis of limited evidence as a starting point for further investigation
A hypothesis is a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
40
What is 'Inertia'?
Answer:
A tendency to do nothing or to remain unchanged
Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion.