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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
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?
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
what are the characteristics of the particles of matter???
Why does the level of water not change when salt is dissolved in water?
Name two gases which are supplied in compressed form in homes and hospitals
write full form of the follwoling
LPG
CNG
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???
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.
during evaporation,particles of a liquid change to vapours only
A) from the surface
B) from the bulk
C) from both surface and bulk
D) neither from surface not from bulk
Define latent heat of fusion
how can show that particles matter have spaces between them?
A gas cylinder cannot be half filled . Give reason
Explain why:
(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
explain whether the following statement is true or false?
"sublimation occurs only when the solid is heated''
do an activity to show that particles of matter are very small beyond our imagination
why do trees acquire more leaves during summer?
1. Why should curd and sour substances not be kept in brass and coppervessels?
cotton is a solid but it floats on water. why?
how does the smell of the cooked food reach our nostrils even without our entering the kitchen
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 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.
10 g of ice at -10 degree Celsius is added to 10 g of water at 85 degree Celsius. What is the final temperature and amount of ice left in the system?
Please explain...
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 is the general name of-
a)rigid form of matter
b)fluid forms of matter
name the solute and solvent of tincture of iodine
The interparticle forces are the strongest in -
1) Ammonia
2) Ethyl Alcohol
3) Carbon dioxide
4) Sodium Bromide
what type of clothes should we wear in summer why
Explain with the help of activity the particulate nature of matter.
The melting point of 3 liquids are 280K , 320K, and 360k. The order of intermolecular force of attraction between these three liquid A,B,C are in the order BCA. label the B.P of each liquid
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?
State 2 characteristics of matter demonstrated by:
(a) diffusion
(b) brownian motion
what is matter
DIFFERENTIATE BETWEEN EVAPORATION AND BOILING.
GIVE 2-3 POINTS
(d) petrol alcohol kerosene oil Water
The valency of sulphur in SO2 and SO3 is 4,6. Pls explain how?
4 substances that sublime
Why is evaporation called surface phenomenon whereas boiling is a bulk phenomenon?
How will you justify that ice , water and steam are the three states of a substance and not different substances?
What of the following substance in the gaseous state should be called a vapour?
1.oxygen 2.flourine 3.chlorine 4.iodine
Why the boiling is known as the bulk phenomenon ?
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?
Based on the following characteristics distinguish in tabular form the behaviour of true solution, suspension and colloidal solution. (a) appearance (b) visibility (c) filterability (d) Tyndall effect (e) particle size. plz answer this question fast for board exam!
how does applying pressure help in liquefaction of a gas?
Why does a solid change to liquid on heating?
a gas exerts pressure on the walls of the container?why?how?
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Syllabus
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
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?
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
what are the characteristics of the particles of matter???
Why does the level of water not change when salt is dissolved in water?
Name two gases which are supplied in compressed form in homes and hospitals
write full form of the follwoling
LPG
CNG
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???
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.
during evaporation,particles of a liquid change to vapours only
A) from the surface
B) from the bulk
C) from both surface and bulk
D) neither from surface not from bulk
Define latent heat of fusion
how can show that particles matter have spaces between them?
A gas cylinder cannot be half filled . Give reason
Explain why:
(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
explain whether the following statement is true or false?
"sublimation occurs only when the solid is heated''
do an activity to show that particles of matter are very small beyond our imagination
Q. The colour of vapours formed on sublimation of iodine solid is
Q. Under which of the following conditions we can boil water at room temperature?
(a) At low pressure (b) At high pressure (c) At very hight pressure (d) At atmospheric pressure
Q. Which of the following does not affect rate of evaporation?
(a) Temperature (b) Pressure
(Q Both (a) and (b) (d) Atmospheric pressure
why do trees acquire more leaves during summer?
1. Why should curd and sour substances not be kept in brass and copper
vessels?
cotton is a solid but it floats on water. why?
Is matter continuous or particulate in nature?
how does the smell of the cooked food reach our nostrils even without our entering the kitchen
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 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.
10 g of ice at -10 degree Celsius is added to 10 g of water at 85 degree Celsius. What is the final temperature and amount of ice left in the system?
Please explain...
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 is the general name of-
a)rigid form of matter
b)fluid forms of matter
name the solute and solvent of tincture of iodine
The interparticle forces are the strongest in -
1) Ammonia
2) Ethyl Alcohol
3) Carbon dioxide
4) Sodium Bromide
what type of clothes should we wear in summer why
a)high compressibility
b)high fluidity
c)high density
d)large volume
Explain with the help of activity the particulate nature of matter.
The melting point of 3 liquids are 280K , 320K, and 360k. The order of intermolecular force of attraction between these three liquid A,B,C are in the order BCA. label the B.P of each liquid
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?
State 2 characteristics of matter demonstrated by:
(a) diffusion
(b) brownian motion
what is matter
DIFFERENTIATE BETWEEN EVAPORATION AND BOILING.
GIVE 2-3 POINTS
(d) petrol alcohol kerosene oil Water
The valency of sulphur in SO2 and SO3 is 4,6. Pls explain how?
(a) very low kinetic energy (b) low kinetic energy
(c) high kinetic energy (d) Highest kinetic energy
4 substances that sublime
Why is evaporation called surface phenomenon whereas boiling is a bulk phenomenon?
How will you justify that ice , water and steam are the three states of a substance and not different substances?
What of the following substance in the gaseous state should be called a vapour?
1.oxygen 2.flourine 3.chlorine 4.iodine
Why the boiling is known as the bulk phenomenon ?
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?
Based on the following characteristics distinguish in tabular form the behaviour of true solution, suspension and colloidal solution. (a) appearance (b) visibility (c) filterability (d) Tyndall effect (e) particle size. plz answer this question fast for board exam!
how does applying pressure help in liquefaction of a gas?
Why does a solid change to liquid on heating?
a gas exerts pressure on the walls of the container?why?how?