Fill in the following blanks with suitable words :(a) Gases can be liquefied by applying ....................... and lowering .....................(b) When steam condenses to form water, heat is .......................(c) Temp on Kelvin scale = Temp on Celsius scale + ........................(d) Scientists say that there are actually five states of matter: solid, liquid, gas, .................... and ...................(e) The state of matter called ........................ makes a fluorescent tube (or neon sign bulb) to glow.
(a) Gases can be liquefied by applying high pressure, and lowering temperature.
(b) When steam condenses to form water, heat is released.
(c) Temp. on Kelvin = Temp. on Celsius scale + 273
(d) Scientists say that are actually five states of matter: solid, liquid, gas, plasma and Bose-Einstein condensate.
(e) The state of matter called plasma makes a fluorescent tube (or neon sign bulb) to glow.
Related Articles The scientists now say that there are actually five states of matter A, B, C, D and E. The state A has a fixed volume but no fixed shape. The state B can be compressed very easily by applying pressure and state C has a fixed shape as well as a fixed volume. The state D is a mixture of free electrons and ions whereas state E is named after an Indian scientist and a famous physicist.(a) Name the physical states (i) A (ii) B (iii) C (iv) D, and (v) E(b) Name one substance belonging to state C which can directly change into vapours on heating. What is this process known as?(c) Name one substance which normally belongs to state B but whose solid form changes directly into gaseous state.(d) Name the most common substance belonging to state A.(e) Which state of matter makes the sun and other stars to glow?
Fill in the following blanks with suitable words :(a) The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................(b) The smell of perfume gradually spreads across a room due to .....................(c) Solid, liquid, and gas are the three ........................ of matter.(d) At room temperature, the forces of attraction between the particles of solid substances are ....................... then those which exist in the gaseous state.(e) The arrangement of particles is less ordered in the ...................... state. However, there is no order in the ..................... state.
(a) What are the two ways in which the physical states of matter can be changed?(b) Draw the 'states of matter triangle' to show the interconversion of states of matter.(c) How can the evaporation of a liquid be made faster?
Write the relation between Kelvin scale and Celsius scale of temperature.
pls tell the relation of celsius and kelvin scale ?
Select the correct word from the following list and fill in the blanks.(a) float (b) water (c) crop (d) nutrients (e) preparationThe same kind of plants grown and cultivated on a large scale at a place is called ______.
Fill in the following blanks with suitable words:(a) An echo is simply a ............. sound.(b) Pitch of sound depends on ................(c) Loudness of sound depends on .............(d) Quality of sound depends on ................(e) Echoes are caused by the ............. of sound.
What should be added to a Celsius scale reading so as to obtain the corresponding Kelvin scale reading?
Matter exists in three physical forms -solid, liquid and gas. In which state the force of attraction between the molecules is (a)strongest (b)weakest?
On what basis are three states of matter?
The Kelvin scale temperature is 0 K. What is the corresponding Celsius scale temperature?
When the solid A is added to water, it dissolves with the evolution of a lot of heat and making little explosions to form two products B and C. The properties of products B and C are entirely different from those of solid A as well as water. Moreover, products B and B cannot be reconverted into solid A and water. When another solid D is added to water, it dissolves with the absorption of a little heat to form a product E which cools down. The product E shows the properties of both, solid D as well as water. Moreover, product E can be converted into solid D and water.(a) What type of change occurs when solid A is dissolved in water? Why?(b) What type of change occurs when solid D is dissolved in water? Why?(c) Name a metal which you think could behave like solid A. Also, name the products B and C.(d) Name the solid D if it is the one which is used in making ordinary dry cells.(e) Name the process by which D can be recovered from E.
Fill in the following blanks with suitable words :(a) Miscible liquids are separated by .........................(b) Immiscible liquids are separated by using a ........................(c) A mixture of kerosene and petrol can be separated by ........................(d) The separation of liquids by fractional distillation is based on the difference in their ............................(e) The gases of air can be separated by fractional distillation of liquid air because they have different ......................(f) A heterogeneous mixture of liquid and solid is conveniently separated by ............................(g) If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
Fill in the following blanks with suitable words:(a) Light travelling along a normal is __________ refracted.(b) Light bends when it passes from water into air. We say that it is __________.
Convert the following temperatures to the kelvin scale.(a) 25°C (b) 373°C
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