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
11
What is 'Evolution'?
Answer:
The change in the characteristics of a species over several generations
Evolution is the change in the heritable characteristics of biological populations over successive generations.
12
What is 'Momentum'?
Answer:
The quantity of motion of a moving body, measured as a product of its mass and velocity
Momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction.
13
What is 'Gravity'?
Answer:
A force that attracts a body toward the center of the earth, or toward any other physical body having mass
Gravity is a fundamental interaction which causes mutual attraction between all things that have mass or energy.
14
What is a 'Vacuum'?
Answer:
A space entirely devoid of matter
A vacuum is a space devoid of matter. The word stems from the Latin adjective vacuus for 'vacant' or 'void'.
15
What is 'Friction'?
Answer:
The resistance that one surface or object encounters when moving over another
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
16
What is a 'Polymer'?
Answer:
A substance that has a molecular structure consisting chiefly or entirely of a large number of similar units bonded together
A polymer is a large molecule, or macromolecule, composed of many repeated subunits.
17
What is the 'Scientific Method'?
Answer:
A systematic way of learning about the world through observation and experimentation
The scientific method is a method of procedure that has characterized natural science, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
18
What is an 'Ion'?
Answer:
An atom or molecule with a net electric charge due to the loss or gain of one or more electrons
An ion is an atom or molecule that has a net electrical charge.
19
What is 'Radiation' (Heat)?
Answer:
Heat transfer through electromagnetic waves
Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it.
20
What is 'Convection'?
Answer:
Heat transfer caused by the movement of a fluid (liquid or gas)
Convection is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink.