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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
liquids have lower density than water but ice floats on water why
what is meant by saying that the latent heat of fusion of ice is 3.34 x 105 J/Kg ??
Differentiate between gas and vapour..
Why does the level of water not change when salt is dissolved in water?
why does the temp. remains constant during the melting of ice even thoug heat is supplied contiously?
a.Salt and sugar kept in different jars take the shape of the jars,yet they are classified as solid.
b.Solid have negligible compressibility yet sponge can compressed.
c.Gases exert pressure on the wall of the container
why evaporation is called surface phenomenon?
Describe an activity to show that particles of matter are continuously moving.
on heating why does diffusion become faster? (Detailed answer)
explain why,ice at 0 degree celcius more effective in cooling than water at the same temperature?
The temperature remains constant during the boiling of water even though heat is supplied continously.Why?
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
arrange the following substances in increasing order of force of attraction between the particles.(a)milk (b)salt (c)oxygen
why do we see water droplets on the outer surface of a glass containing ice cold water
cotton is a solid but it floats on water. why?
what are the characteristics of the particles of matter???
change of gaseous state directly to solid state without going through liquid state is known as__________________.
Name two gases which are supplied in compressed form in homes and hospitals
write full form of the follwoling
state effect of 1) surface area 2) nature of the liquid on rate of evaporation
is it possible to liquify atmospheric gases ? if yes suggest a method
these question teacher has given for exam coming bt i dont know the answer because it is a difficult question pls expert help me otherwise my teacher will scold me and i will commit suicide pls answer pls
How to show the sublimation of ammonium chloride???
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.
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
What is interparticle space?
how can show that particles matter have spaces between them?
(a)air is used to make inflate tyres.
(b)steel is used to make railway lines.
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 ?
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 matter
why do trees acquire more leaves during summer?
1. Why should curd and sour substances not be kept in brass and coppervessels?
is it possible to liquify atmospheric gases? if yes suggest a method?
give reason water at room temperature is a liquid
Explain the interconversion of 3 states of matter in terms of force of attraction and kinetic energy of molecules.
A substance has a definite volume but no definite shape. State whether this substance is a solid, liquid or gas.
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.
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
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
how to download exam idea book for class9
What is the difference between Gas and Vapour?
when 50 grams of sugar is added to 100 ml of water,there is no increase in volume.what characteristic of matter is illustrated by this observation?
State 2 characteristics of matter demonstrated by:
(b) brownian motion
DIFFERENTIATE BETWEEN EVAPORATION AND BOILING.
GIVE 2-3 POINTS
The valency of sulphur in SO2 and SO3 is 4,6. Pls explain how?
4 substances that sublime
Why the boiling is known as the bulk phenomenon ?
How will you justify that ice , water and steam are the three states of a substance and not different substances?
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?
what happens if you put copper sulphate crystals in water?
how does applying pressure help in liquefaction of a gas?
pressure on the surface of a gas is increased.what will happen to the inter particle forces?
what happens when a liquid is heated?
what is density?
please answer thisquestion faster ........ my mam is taking a surprise test on every saturday from chapters completed pls experts quick.
a gas exerts pressure on the walls of the container?why?how?
How will you show that air has maximum compressibility
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