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20 questions
Which of the following substances does not show phenomenon of sublimation ?
Iodine
Sodium Chloride
Ammnium chloride
Camphor
How many natural physical states of matter are there ?
2
3
4
5
Kelvin =........ + °Celsius
373
173
273
773
The mass per unit volume of a substance is called......
area
density
pressure
rigidity
What is full form of PNG ?
Petrol natural Gas
Pressurised Netural Gas
Pressurised Natural Gas
Pipe Natural Gas
What change is observed in a matter of substance with rise in temperature ?
Weight decreases
weight increase
volume increase
volume decrease
Which of the following matters possesses definite volume but doed not possess shape ?
Oxygen
steel
Chalk
kerosene
At what temperature does water boil at atmospheric pressure?
100 k
100°C
-100°C
273 K
The physical state of water at 273K, Which is the melting point of ice will be observed as.....
Solid
liquid
vapour
solid as well as liquid
The process drying of wet clothes is called.....
Evaporation
condensation
cooling
Ice floats on water because the density of ice is....... Than that of water.
Less
more
Equal to
On keeping naphthalene balls open in air, its volume......
Increases
Decrease
remains same
Every matter has fixed shape.
True
False
The clothes dry faster on a windy day.
True
False
Camphor is not a sublimble substance.
True
False
The concentration of water vapour in the atmosphere is called humidity.
Ture
false
Every matter has mass.
True
False
The kinetic energy of particles in gaseous state is maximum.
True
False
The speed of evaporation increases with increases of free surface area.
Ture
False
The rate of diffusion of gas is less than that of solid and liquid.
True
False
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