1 | P a g eMARK SCHEME FOR MODULE SCORE A BERITA HARIAN 2010IMPORTANT TERMINOLOGIES IN CHEMISTRY.1. Hydrocarbon2. Isomers3. Empirical formula4. Electrolysis5. Oxidiing agent!. "educing agent#. Exot$ermic reactions%. Endot$ermic reactions&. Heat of neutraliation1'. (elting point11. )trong al*ali12. )trong acid13. +ea* al*ali14. +ea* acid15. ,$e rate of reaction1!. )alts1#. -cti.ation energy1%. )aponification1&. "edoxs2'. /nsaturated $ydrocarbon21. 0ouble dissociation reactions1precipitate reactions22. 2ulcaniation 23. ,$e $eat of displacement24. Polymerisation25. PolymersANSWERS WITH IN CORRECT TERMS, WORDS OR INCORRECT KEY WORDSBIL.INCORRECT TERMS[TIDAK TEPAT]CORRECT TERMS[TEPAT]1. 3$ocolate precipitate 4ro5n precipitate2. - stable atom -tom t$at ac$ie.ed octet1duplet electron arrangement3. (elting point is t$e point 5$ere solid start to c$anges to li6uid.(elting points is t$e temperature 5$ere solid start to c$anges to li6uid4. 3lear solution 3olourless solution5. 7ucleus contains 1 proton number and 1 neutron number7ucleus contains 1 proton and 1 neutron!. )odium donates electron )odium atom donates one electron#. (agnesium is more !"i#e t$an inc (gnesium is more reacti.e t$an inc%. E3) Electroc$emical series&. In t$e electroc$emical series8 magnesium is more re!"i#e t$an incIn t$e electroc$emical series8 magnesium is more electropositi.e t$an inc1' In t$e reacti.ity series8 magnesium is more e$e!"ro%osi"i#e t$an incIn t$e reacti.ity series8 magnesium is more reacti.e t$an inc1 | ( a r * ) c $ e m e f o r ( o d u l e ) * o r - 4 1 H a r i a n 2 ' 1 '2 | P a g eQuestion 1i..Mg+2HCl MgCl2+H2ii.O2-+ 2H+H2Oiii. [NaNa++ e ] x 22H ++ 2eH22Na +2H +2Na++ H2iv. MnO4 - + 8H+ + 5e Mn2 + + H2Oi. Cr2O7 2- + 1H++ !e 2Cr 3+ + "H2OQuestion 2T#$e o% &'ses Met(o) O*se+,'tionHydrogen Put in lighted ooden !"linterinto the te!t tu#e$POP% !ound hear&heardOxygen Put in gloing ooden !"linterinto the te!t tu#e'loing ooden !"linter light!u" & re(indle!Chlorine Put in )oi!t #lue lit)u! "a"erinto the te!t tu#eMoi!t #lue lit)u! "a"er turn!red and then #lea*he!Car#on dioxide+u##le-u" the ga! throughli)eater,i)e ater #e*o)e*loudy&)il(y&*hal(y&'ESTION (i. 3u3O3 3uO 9 3O 2:2 mar*s;ii. +$en 1 mole of coppertemperature"esponding >rate of reaction3onstant >.olume and concentration of acid 1 .olume and concentration of sodium t$iosulp$ateM"eri$s21 mol dm B3 sulp$uric acid8 '.2 mol dm B3 sodium t$iosulp$ate solution8 5$ite paperA%%r":s21! | ( a r * ) c $ e m e f o r ( o d u l e ) * o r - 4 1 H a r i a n 2 ' 1 '1# | P a g e3onical flas*8 measuring cyclinder8 stop5atc$8 4unsen burner8 5ire gaue8 tripod stand8 t$ermometer.Pro!e.:re21. -n OAP is mar*ed on a piece of 5$ite paper.2. /sing measuring cyclinder8 5' cm 3 of '.2 mol dm B3 sodium t$iosulp$ate solution is measured and poured into t$e conical flas* 5$ic$ is t$e placed on t$e paper mar*ed OAP.3. ,$e temperature of t$e sodium t$iosulp$ate solution is recorded.4. /sing measuring cyclinder8 5 cm 3 of 1.' mol dm B3 sulp$uric acid is measured.5. Immediately8 t$e sulp$uric acid is poured into t$e conical flas* and s$a*en. !. ,$e stop5atc$ is started.#. ,$e formation of yello5 precipitate of sulp$ur is on ser.ed at t$e top of t$e conical flas*. ,ime is recorded 5$en t$e OAP mar* on t$e 5$ite paper is no longer .isible.%. ,$e experiment is repeated. Eac$ time t$e temperature of t$e sodium t$iosulp$atesolution is increased by 5 ' 3 .T