Definitions and MCQs of Ninth Class Chemistry (states of matter)

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Definitions and MCQs of Ninth Class Chemistry (states of matter)

  1. 1. Chapter 6States of matter(Every action has reaction, yes exactly if youcan not please your books how you will bepleased)Chemistry Def. & MCQs Dr. Sajid Ali Talpur
  2. 2.  Definitions1. Matter: - Any thing having mass and volume iscalled matter.2. Solid: - The state of matter having specificshape and volume3. Liquid: - The state of matter having specificvolume but not the shape.4. Gas: - It is the state of matter having neitherspecific volume nor the shape5. Diffusion: - the distribution or spreading of thegas molecules throughout the vessel is known asdiffusion. OR the mixing and merging of themolecules with each other is called diffusion6. Pressure: -force per unit area.7. Temperature: - the degree of hotness orcoldness of a body is called temperature.8. Heat: - it is the form of energy that producessense of warmth and flows from hot body tocold body.9. Density: - the mass unit volume is calleddensity. (d=M/V)Chemistry Def. & MCQs Dr. Sajid Ali Talpur
  3. 3. 10. Vapour pressure: - it is the pressure exerted bythe vapors on the surface of liquid when rate ofcondensation exceeds the rate of evaporation.11. Boiling: - when vapour pressure of liquid equalsthe atmospheric pressure, the bubbles of vapourform easily and rise to the surface. The liquid issaid to boil.12. Boiling point: -it is the temperature at whichboiling starts.13. Melting: - conversion of a solid into liquid.14. Melting point: - it is the temperature at whichmelting begins to take place.15. Sublimation: -the process of conversion ofsolids directly into gases form without passingthrough the liquid state is called sublimation.16. Phenomenon: -an observable event.17. The latent heat of fusion: - heat requiredduring conversion of the state. OR the heatenergy required converting 1g of a solid intoliquid at its melting point.18. Brownian motion: - A continuous, zigzagmotion of suspended particles through themedium is called Brownian motion.Chemistry Def. & MCQs Dr. Sajid Ali Talpur
  4. 4.  Multiple Choice Question1. Any thing having mass and volume is not calledcalleda) power b) energyc) both a & b d) matter2. The quantity of matter in a body is calleda) mass b) energyc) matter d) volume3. According to K.M.T all are true except:a) molecules are always in motion:b) they possess K.Ec) they possess P.Ed) molecules are very tiny particlese) N.O.T4. The space occupied by an object is calleda) mass b) energyc) volume d) matter5. Regarding gases all are true except:a) K.E very lowb) intermolecular space very highc) neither shape nor volumed) molecules move in all directions.6. The liquids have constant shape but not volume.a) true b) false7. The spreading of a substance through a mediumis called:Chemistry Def. & MCQs Dr. Sajid Ali Talpur
  5. 5. a) diffusion b) Brownian motionc) effusion d) fusion8. A continuous, rapid, zigzag motion ofsuspended particles through the medium iscalled Brownian motion.a) true b) false9. Water can exist in all the three states of matter.a) true b) falseThe Book MCQs10. The number of common states of matter is:a) 3 b) 4c) 5 d) N.O.T11. Neither definite shape nor volume is theproperty of:a) solids b) liquidsc) gases d) N.O.T12. The temperature at which the vapour pressure ofa liquid becomes equal to its external pressure iscalled:a) melting point b) boiling pointc) triple point d) freezing point13. The state of matter in which molecules aretightly packed and possess only vibratorymotion is:a) solid state b) liquid statec) gaseous state d) N.O.TChemistry Def. & MCQs Dr. Sajid Ali Talpur
  6. 6. 14. The process in which molecules escape from thesurface of liquid is called:a) sublimation b) evaporationc) boiling d) melting15. the process in which solid directly changes togas is calleda) sublimation b) evaporationc) boiling d) meltingAnswer Key1 C 2 A 3 C4 C 5 A 6 B7 A 8 B 9 A10 A 11 C 12 B13 A 14 B 15 AChemistry Def. & MCQs Dr. Sajid Ali Talpur
  7. 7. 14. The process in which molecules escape from thesurface of liquid is called:a) sublimation b) evaporationc) boiling d) melting15. the process in which solid directly changes togas is calleda) sublimation b) evaporationc) boiling d) meltingAnswer Key1 C 2 A 3 C4 C 5 A 6 B7 A 8 B 9 A10 A 11 C 12 B13 A 14 B 15 AChemistry Def. & MCQs Dr. Sajid Ali Talpur

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