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
4061
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.
4062
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).
4063
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.
4064
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.
4065
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.
4066
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.
4067
What is 'Osmosis'?
Answer:
The movement of solvent molecules through a semi-permeable membrane
Osmosis is the spontaneous net movement or diffusion of solvent molecules through a selectively permeable membrane from a region of high water potential to a region of low water potential.
4068
What is a 'Catalyst'?
Answer:
A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change
A catalyst is a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.
4069
What does 'Velocity' measure?
Answer:
The rate of change of position of an object (speed with direction)
Velocity is a vector quantity that refers to 'the rate at which an object changes its position'. It includes both speed and direction.
4070
What is 'Sublimation'?
Answer:
Transition from solid directly to gas
Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state.