1) The colour property to differ between a) table salt flour b) iron and gold  c) oxygen and nitrogen d) oxygen and CO 2 2) From substances that float on water a) Iron b) copper c) cork d) aluminium 3) gas used in filling the balloons of festivals a) Oxygen  b) Nitrogen c) Helium d) Neon 4) Heating coils are made of ..........alloy a) iron - copper  b) nickel- chrome  c) nickel -copper  d) chrome- iron  5) separation the components of petroleum depends on the difference in ........ a) melting point b) boiling point c) densities d) all of them 6) the property of electric conduction to differ between ....... a) iro - copper b) wood - plastic c) iron - wood d) No correct answer 7) among elements find great difficulty to react with oxygen a) potassium b) sodium c) aluminium d) chromium 8) The metal used to cover another metal a) silver b) copper c) lead d) iron 9) iron is soft while rubber is hard at room temperature a) True b) False 10) when potassium exposed to dry air it rusts after several days a) True b) False 11) The mass of unit volume of the matter a) Matter  b) Molecule  c) Density d) Mass 12) potassium and sodium are kept under surface of ..... a) lead b) hydrogen chloride c) grease d) kerosene 13) copper rods not iron rods are not used in building concrete houses a) True b) False 14) The odd word is a) wax b) aluminium c) butter d) ice 15) The odd word is ..... a) acidic solution b) sugary solution c) alkaline solution d) salt solution 16) The motion of molecules of solid is a) Limited b) more free c) unlimited d) completely free 17) the inter molecular spaces among the molecules of oxygen a) medium b) very large c) very small d) no correct answer 18) The attraction force in iron molecules is a) large  b) small c) very small d) no correct answer 19) the matter doesn't take the shape of container a) solid b) liquid c) gaseous d) liquid and gaseous 20) the melting reverse a) vaporization b) freezing c) condensation d) no correct answer 21) The molecule consists of similar atoms a) atom b) element c) compound d) mixture 22) Molecule of noble gases consists of ..........atom(s) a) one b) two c) three d) one or two 23) the mono atomic liquid element is a) bromine b) mercury c) iodine d) chlorine 24) Molecule consist of two atoms of two different element a) water b) ammonia c) chlorine d) hydrogen chloride 25) ammonia formed of one atom of oxygen and three atoms of hydrogen a) True b) False 26) The result of combination between two or more different atoms with constant ratio a) Element b) Compound c) Molecule d) atom 27) The building unit of the matter a) atom b) molecule c) compound  d) protons 28) The odd word is a) ammonia b) water c) Aluminum d) hydrogen chloride 29) The odd word is a) Neon b) Oxygen c) Argon d) Xenon 30) The density of helium is .............. air  a) more than b) less than  c) Equal to d) no correct answer 31) All of the following are molecules composed of one atom except a) argon b) mercury c) bromine d) krypton 32) All of the following are compounds molecules except ............ a) water b) ammonia c) hydrogen chloride d) fuorine 33) All of the following ae noble gases execpt ......... a) hydrogen b) neon  c) xenon d) argon 34) The smallest part of the matter that can exist freely ........... a) atom b) compound c) element d) molecule 35) The intermolecular force among the molecule of mercury is ............ a) very large b) weak c) vanished d) very small

Prep 1.Science games

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