JA BA TA N PELAJA RAN JOHOR JA JA ' Ckao iRAN JOHOR JA JAt at>Z iRAN JOHOR JA lABATAN PELAJARANJOHOR JA JABATANPELAJARANJOHOR JA JA BA TA N PELAJA RAN JOHOR JA JABATAN PELAJARANJ JABATAN PELAJARANJ JABATANPETAJARANJ / JOHOR JABATANPELAJARjlNJOHOR JABATAN PERCUBAAN STPM 2011 A UOHOh UOlLOh ~ . . . » . ^wi i iN J JOHOR JABA TAN PFXAJARANJOJTOR JA BA TAN J JOHOR JA BA TA N PELAJA RA N JOHOR JA BA TA N UOHOR JABATANPEJAJARAN JOHOR JABATAN BA TAN PELAJA RA N JOITOR JA BA TA N CHEMISTRY (KIMIA) BATAHPELAJARANJOHOR JABATAN 'i7nV^ZnTrT/,T^ BATANPEJ,AJARANJOHORJABATAN JABATAN PELAJARAN JOHOR JABATAN PELAJARAN JOHOR JABA TAN PElAJARAN JOHOR JABA TAN JABATANPELAJARANJOHORJABATANPELAJARANJOllORJABATANPELAJARANJOHOR JABATAN JABA TAN PELAJARAN JOHOR JABATAN PELAJARANJOHOR JABA TAN PELAJARAN JOHOR IABA TAN J t B nI^J3r A ^l ANJOHOR " MARK QPHFMP lORJABATANPELAJARANJOHOR JABATAN JAJiATAN PELAJARAN JOHOR ^ MARK SCHEME lORJABATANPELAJARANJOHORJABATAN ^BATANPELAJARANJOHORJABATANPELAJARANJOHORJABATANPELAJARANJOHOR JABATAN •MBATANPELAJARANJOHORJABATANPELAJARANJOHORJABATANPELAJARANJOHORJABATAN JABATANPELAJARANJOHOR JABATANPELAJARANJOHOR JABATANPELAJARANJOHOR JABATAN JABA7ANPELAJARAN JOHOR JABATANPELAJARAN JOHOR JABATAN PELAJAJtAN JOHOR lABATAN JABATAN PELAJARAN JOHOR SIJILTINGGI PERSEKOLAHAN MALAYSIA STPM %'-/l http://edM.joShuatly.GOmJ CONFIDENTIAL*
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Skema STPM Johor Chemistry 2011 Trial (edu.joshuatly)
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JA BA TA N PELAJA RAN JOHOR JA
JA' Ckao i R A N J O H O R J A
JAt a t > Z iRAN JOHOR JA
lABATAN PELAJARANJOHOR JA
JABATANPELAJARANJOHOR JA
JA BA TA N PELAJA RAN JOHOR JA
JABATAN PELAJARANJ
JABATAN PELAJARANJ
JABATANPETAJARANJ
/ JOHOR JABATANPELAJARjlNJOHOR JABATAN
PERCUBAAN STPM 2011 A UOHOh
UOlLOh ~ . . . » . ^wi i iN
J JOHOR JABA TAN PFXAJARANJOJTOR JA BA TAN
J JOHOR JA BA TA N PELAJA RA N JOHOR JA BA TA N
UOHOR JABATANPEJAJARAN JOHOR JABATAN
BA TAN PELAJA RA N JOITOR JA BA TA N
CHEMISTRY (KIMIA) BATAHPELAJARANJOHOR JABATAN ' i 7 n V ^ Z n T r T / , T ^ BATANPEJ,AJARANJOHORJABATAN JABATAN PELAJARAN JOHOR JABATAN PELAJARAN JOHOR JABA TAN PElAJARAN JOHOR JABA TAN
JABATANPELAJARANJOHORJABATANPELAJARANJOllORJABATANPELAJARANJOHOR JABATAN JABA TAN PELAJARAN JOHOR JABATAN PELAJARANJOHOR JABA TAN PELAJARAN JOHOR IABA TAN
J t B n I ^ J 3 r A ^ l A N J O H O R " M A R K Q P H F M P lORJABATANPELAJARANJOHOR JABATAN JAJiATAN PELAJARAN JOHOR ^ MARK SCHEME lORJABATANPELAJARANJOHORJABATAN
^BATANPELAJARANJOHORJABATANPELAJARANJOHORJABATANPELAJARANJOHOR JABATAN
Ka)(i) PV = nRT 1 500 x 103 x 20.0 x 10"3 = (1.5 + x + 1.2) X 8.31 x298 1 X= 1.3 1 Or
X = 500 X IO3X 2Q.Q X iO'3
8.31 x 298
= 1.3
1(a){ii) , g I'5, x500.— 188 kPa 1.5 + 1.3 + 1.2
1
1{b)(i) N : 1 s22s22p3 1
1{b){ii) >M "
H o l f N"* N* 0H OX O t
H H 1
1(c)(i) Relative molecular mass of propanorie is higher, therefore stronger Van der Waa!s forces of attractions exist between molecules compared to the ether.
2(a) (i) The standard electrode potential is the potential difference between the standard hydrogen efectrode and other electrode systems with the concentration of1.0 M at 1 atm I under standard conditions
8(b)(i) Formuia of X is [Cr (H2O)4 Cl2]+. Cf" .2H20 ~ Geometric (or cis-trans) isomerism
8(b)(ii)
1 1
1
1 trans-tetraaquadichlorochromium(lll) ion
cis-tetraaquadichlorochromium{ll[) ion
1
1
I
Question Details Mark Awarded
9(a) Optical isomerism occurs in compounds with the same structural formula but differ in their effect on plane-polarised light.
~ r ~
- Optical isomers contain a chira! carbon, 1
- Are nonsuperimposabie or mirror images to one another, 1 - Rotate the plane of plane-polarised light in opposite direction but to the same degree. 8 9 OH 1
CH3 — C — CH2CH3
t H
(max 3 marks)
(b) Since X gives white fumes with PCI5, X is an a!cohol.
X gives a give yellow precipitates with a!ka!ine iodine shows that X has structure . CH3CH(OH)R
Hence X is 1-phenylethanol. CHXH(OH)CgH i
Equations :
CH3CH(OH)C6H5 + PCI5 > CH3CH(Cl)C6H5 +
X HCl + POCl3
White fumes
CH3CH(OH)C6H5 + *I2 + 6Na OH" — * CHI3 + v yellow precipitate A