Select Board & Class
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
0.5g of salt is dissolved in 25g of water . Calculate the percentage amount of salt in that solution
Differentiate between gas and vapour..
which of the following solutions will show tyndall effect?
starch solution , sodium chloride solution, tincture iodine , air
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.
arrange the gases present in the air in th increasing order of their boiling points.Which gas forms liquid first as the air is cooled?
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???
Name two gases which are supplied in compressed form in homes and hospitals
write full form of the follwoling
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.
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.
Why does water boils at lower temperature at higher altitudes?
How to show the sublimation of ammonium chloride???
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?
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.
A substance has no no mass. can we regard it as matter or not??
Define latent heat of fusion
Why does the level of water not change when salt is dissolved in water?
how can show that particles matter have spaces between them?
identify solute and solvent in 80%solutionof ethyl alcohol with water
(a)air is used to make inflate tyres.
(b)steel is used to make railway lines.
what is the meaning of fixed volume
why does the temperature of a substance remain constant during its melting point or boiling point ?
change of gaseous state directly to solid state without going through liquid state is known as__________________.
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
why do trees acquire more leaves during summer?
1. Why should curd and sour substances not be kept in brass and coppervessels?
Asolution contain 16g of urea in 120g of solution. What is mass by mass percentage of solution .
what is matter?
give reason water at room temperature is a liquid
how does applying pressure help in liquefaction of a gas?
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.
water as ice has a cooling effect, where as water as steam may cause severe burns. Explain these observations.
calculate the number of molecules in 4g of oxygen.
is rubber band a solid.then why it changes its shape on streaching
name the solute and solvent of tincture of iodine
is wind matter or non matter?
what type of clothes should we wear in summer why
Explain with the help of activity the particulate nature of matter.
Although sugar is a solid it takes the shape of the container in which it's kept. Why?
describe an activity to show that matter is composed of particles
why is a sponge compressible even though it is a solid???
how to download exam idea book for class9
what is the effect of pressure on physical state of matter? explain with an example of gas
What is the difference between Gas and Vapour?
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?
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
4 substances that sublime
How will you justify that ice , water and steam are the three states of a substance and not different substances?
In which state of matter, diffusion is (a) fastest ,(b) slowest . explain?
Why the boiling is known as the bulk phenomenon ?
How matter is continuous like a block of wood
why should we wear cotton clothes in summer?
What happen when we apply pressure to the particles of matter
ICE AT 0 DEGREE CELCIUS APPEARS COLDER TO THE MOUTH THAN WATER AT 0 DEGREE CELCIUS.WHY?
a gas exerts pressure on the walls of the container?why?how?
How many free surfaces do solids, liquids and gases have and why?
Copyright © 2020 Applect Learning Systems Pvt. Ltd. All rights reserved.
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)