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Early Indian philosophers classified matter in the form of ..............basic elements
1. five
2. four
3. three
4. two
The particles of matter are very ............they are ........beyond our imagination
1. large
2. small
3. medium
4. none of these
When we dissolve salt in water, the particles of salt get into the spaces between particles of water, this shows that particles ......................
1. matter is made up of particels
2. particles of matter attract each other
3. matter have space between them
4. none of these
Particles of matter are continuously moving, that is, they possess what we call the ,..............
1. kinetic energy
2. potential energy
3. both kinetic energy and potential energy
4. none of these
with ................in temperature the kinetic energy of the particles also ,...............
1. decrease
2. increase
3. moderate
4. none of these
The intermixing of particles of two different types of matter on their own is called ......................
1. diffusion
2. fussion
3. osmosis
4. noe of these
on ............... diffusion become ...........
1. cooling , faster
2. heating , slower
3. cooling , slower
4. heating , faster
The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close because of the process of ...................
1. fusion
2. osmosis
3. diffusion
4. transportation
matter around us exists in ............... different states
1. four
2. three
3. two
4. one
The rate of diffusion of liquids is................than that of solids
1. higher
2. lower
3. equal
4. none of these
full form of LPG is
1. liquid petroleum gas
2. liquified petroleum gas
3. liquid pump gas
4. liquified potassium gas
The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its..................
1. boiling point
2. freezing point
3. melting point
4. critical point
The melting point of ice is..................
1. 273.16 K
2. 0 K
3. 320 K
4. 274.17 K
The process of melting, that is, change of solid state into liquid state is also known as ............
1. diffusion
2. fusion
3. vapourization
4. evaporation
The amount of heat energy that is required to change 1 kg of a solid into liquid at atmospheric pressure at its melting point is known as the .................
1. latent heat of vapourization
2. latent heat of evaporation
3. latent heat of fusion
4. diffusion
The temperature at which a liquid starts boiling at the atmospheric pressure is known as its .....................
1. boiling point
2. melting point
3. critical point
4. none of these
The amount of heat energy that is required to change 1 L of a liquid into gas at atmospheric pressure at its melting point is known as the................
1. latent heat of vapourization
2. latent heat of fusion.
3. diffusion
4. none of these
A change of state directly from solid to gas without changing into liquid state (or vice versa) is called ...................
1. vapourization
2. diffusion
3. sublimation.
4. none of these
The phenomenon of change of a liquid into vapours at any temperature below its boiling point is called .................
1. evaporation
2. condensation
3. sublimation
4. none of these
the rate of evaporation increases with
1. an increase of surface area
2. an increase in wind speed
3. a decrease in humidity
4. all of these
clothes dry faster on a windy day because of
1. a decrease in humidity
2. an increase in wind speed
3. an increase in surface area
4. none of these
the particles are in the form of ionised gases in
1. solid state
2. liquid state
3. gaseous state
4. plasma
The forces of attraction between the particles are maximum in
....................
1. solid
2. liquid
3. gas
4. none o fthese
Evaporation causes ..................
1. cooling
2. heating
3. humidity
4. none of these
unit of pressure is
1. kelvin
2. newton
3. joules
4. pascal
The forces of attraction between the particles are ninimum in
1. solid state
2. liquid state
3. gaseous state
4. none of these
the process of conversion of liquid to solid is called
1. condensation
2. solidification
3. sublimation
4. none of these
the conversion of gaseous state to liquid state is called
1. solidification
2. sublimation
3. condensation
4. evaporation
boiling point of water is
1. 100 C
2. 273 K
3. 50 C
4. 0 C
full form of CNG is
1. compressed natural gas
2. compressed neutal gas
3. compassion natural gas
4. none of these

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