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10 examples of evaporation in daily life with explanations?
why is evaporation called a surface phenomena
why do the doctors advise to put strips of wet cloth on thr forehead of a person having high fever?
why does steam cause more severe burns than boiling water
why do clothes take more time in drying on a rainy season
liquids have lower density than water but ice floats on water why
Differentiate between gas and vapour..
why does the temp. remains constant during the melting of ice even thoug heat is supplied contiously?
why evaporation is called surface phenomenon?
which gas controls burning
carbondioxide or nitrogen
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Describe an activity to show that particles of matter are continuously moving.
explain why,ice at 0 degree celcius more effective in cooling than water at the same temperature?
compare in tabular form, the properties of solid,liquids,and gases with respect: i)shape ii)volume iii)commpressibilty iv)diffusion v)fluidity or ridgidity
why do we see water droplets on the outer surface of a glass containing ice cold water
mention the property due to which when a hanging carpet is beaten with a stick the dust particles start coming out of it?
what are the characteristics of the particles of matter???
how does applying pressure help in liquefaction of a gas?
Name two gases which are supplied in compressed form in homes and hospitals
write full form of the follwoling
which of the following solutions will show tyndall effect?
starch solution , sodium chloride solution, tincture iodine , air
Explain why we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert.
How to show the sublimation of ammonium chloride???
what is the meaning of fixed volume
Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy, and density. Also, please compare these properties with solids, liquids and gases.
Define latent heat of fusion
why do liquid have fixed volume but no fixed shape
how can show that particles matter have spaces between them?
how can we seperate mixture of iodine and ammonium chloride
Define melting point of a solid.. At what temperature in the kelvin scale does ice melt? In the experiment to determine the melting of ice, why does the temperature not rise till all the ice melts even though heat is continuously supplied? What is this heat energy called?
(a)air is used to make inflate tyres.
(b)steel is used to make railway lines.
0.5g of salt is dissolved in 25g of water . Calculate the percentage amount of salt in that solution
why does the temperature of a substance remain constant during its melting point or boiling point ?
activity to show that gases are highly compressible than solids and liquids ?
what is the effect of pressure on physical state of matter? explain with an example of gas
examples of application of evaporation used in our daily life
do an activity to show that particles of matter are very small beyond our imagination
What is the process of gas directly changing into a solid called?
why do trees acquire more leaves during summer?
Why does a wet khus-khus screen hung at the door keep the room cool?
1. Why should curd and sour substances not be kept in brass and coppervessels?
A solution of H2SO4 is labeled 40%. The density of the solution is 1.3gm/l.
give reason water at room temperature is a liquid
a compound is regarded as a pure substance while the mixture is not . assign the reason ?
Explain the interconversion of 3 states of matter in terms of force of attraction and kinetic energy of molecules.
Why does the level of water not change when salt is dissolved in water?
A wooden table should be called a solid give reason
(a) Tabulate the
differences in the characteristics of states of matter.
(b) Comment upon the following: rigidity, compressibility, fluidity,
filling a gas container, shape, kinetic energy, and density.
why is heat energy needed to melt a solid what is this heat energy called
water as ice has a cooling effect, where as water as steam may cause severe burns. Explain these observations.
is rubber band a solid.then why it changes its shape on streaching
What of the following substance in the gaseous state should be called a vapour?
1.oxygen 2.flourine 3.chlorine 4.iodine
name the solute and solvent of tincture of iodine
what type of clothes should we wear in summer why
Explain with the help of activity the particulate nature of matter.
describe an activity to show that matter is composed of particles
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what happens when a liquid is heated ?
What is the difference between Gas and Vapour?
Why is sodium light and iron hard in nature?
State 2 characteristics of matter demonstrated by:
(b) brownian motion
Asolution contain 16g of urea in 120g of solution. What is mass by mass percentage of solution .
DIFFERENTIATE BETWEEN EVAPORATION AND BOILING.
GIVE 2-3 POINTS
1.the arrangement of particles is most ordered in ________.
2.how are the states of matter interconvertible?
3,why is vapourisation a surface phenomenon?
4.what is dry ice?
5.can solid diffuse into solid?
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The valency of sulphur in SO2 and SO3 is 4,6. Pls explain how?
4 substances that sublime
In which state of matter, diffusion is (a) fastest ,(b) slowest . explain?
How will you justify that ice , water and steam are the three states of a substance and not different substances?
What is dry ice?
Why the boiling is known as the bulk phenomenon ?
change of gaseous state directly to solid state without going through liquid state is known as__________________.
why should we wear cotton clothes in summer?
ICE AT 0 DEGREE CELCIUS APPEARS COLDER TO THE MOUTH THAN WATER AT 0 DEGREE CELCIUS.WHY?
Why does water boils at lower temperature at higher altitudes?
a gas exerts pressure on the walls of the container?why?how?
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