This page is part of Matter in our Surroundings Class 9 notes for Chemistry.Topics covered in this page are
On the basis of physical state, all the matter can be classified into three groups: Solids, Liquids and Gases.
Test Your Knowledge
Fill in the blanks
(1) On the basis of physical properties, matter is classified as _____, _______ and _____
(2) On the basis of chemical properties, matter is classified as _____, _______ and _____.
(3) The particles which make up matter are ____ and ____.
(4) The zigzag movement of the small particles suspended in a liquid (or gas) is called _______
(5) The particles of matter have __________________ between them.
(6) The particles of matter are constantly _____
(7) The best demonstration that particles of matter are constantly moving comes from the experiments on __________________ and ______.
(8) The __________________ of attraction between the particles of the same substance is known as cohesion.
(9) The force of __________________ between the particles of chalk is quite weak, the force of __________________ between the particles of ice is a bit stronger whereas the force of __________________ between the particles of iron nail is very, very strong.
(10)The force of attraction is maximum in the particles of __________________ and minimum in the particles of a _____
(11) Solids have a fixed shape and fixed __________________ Liquids have fixed __________________ but they have no fixed shape .Gases have neither a fixed shape nor a fixed __________________
(12) According to the kinetic theory of matter, the particles of matter are in continuous motion and possess _______.
(13) The forces of __________________ tend to hold the particles together and control their movements.
(14) The spaces between the particles are the __________________ in solids, a little more in liquids, and the maximum in gases.
(15) The forces of __________________ between the particles are the strongest in solids, less strong in liquids and negligible in gases.
Answer
(1)Solid ,liquid and Gases
(2)elements, compounds and mixtures.
(3) atom and molecules
(4)Brownian motion.
(5)space
(6)moving
(7) diffusion and Brownian motion
(8)force
(9)attraction
(10)solid and gaseous
(11) volume
(12) Kinetic energy
(13) attraction
(14) minimum
(15)attraction
Plasma and Bose- Einstein Condensate are two more states of mater apart from three other discusse dpreviously.
Test your Knowlegde
Fill in the blanks
(1) __________________ gas can be liquefied by applying high pressure and lowering the temperature.
(2) Decreasing the pressure and raising the temperature can change the state of __________________.
(3) Solid carbon dioxide (dry ice) is stored under high __________________.
(4) The process of a liquid changing into vapour (or gas) even its boiling point is called evaporation.
(5) The wet clothes dry due to __________________ of water present in them.
(6) The evaporation of a liquid depends mainly on the factors ______,Surface area, Humidity and __________________ speed
(7) If the same liquid is kept in a test tube and in a china dish, then the liquid kept in the _____ evaporate more rapidly.
(8) The amount of water present in air is represented by a term called _____
(9) The cooling caused by __________________ is based on the fact that when a liquid evaporates, it draws or takes the latent heat of
vaporization from anything which it touches.
(10) During hot __________________ days, water is usually kept in an earthen pot (called pitcher or matka) to keep it cool.
(11) It is recommended to wear ______ in hot summer days to keep cool and comfortable.
(12) ______________ vapor comes into the air from the evaporation of __________________ present in ponds, lakes, rivers and oceans.
(13) ______________ vapor is alsogiven out by plants by the process of transpiration.
(14) Plasma is a mixture of ____ and ____
(15) BEC stands for ________________
Answer
(1)Ammonia
(2)matter
(3)pressure
(4)evaporation
(5)evaporation
(6)Temperature and wind
(7)china dish
(8)humidity.
(9)evaporation
(10)summer
(11)cotton clothes
(12)Water
(13)Water
(14)free electrons and ions
(15)Bose Einstein Condensate
