Mark Scheme (Results) November 2009
Mark Scheme (Results)
November 2009
IGCSE
IGCSE Chemistry (4335) Paper 2H
Edexcel Limited. Registered in England and Wales No. 4496750
4335_1F
Nov
2009
Registered
Office:
One90 High Holborn, London WC1V 7BH
i
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November 2009
Publications Code UG022296
All the material in this publication is copyright
? Edexcel Ltd 2009
4335_2H Nov 2009
ii
SECTION
Question
1 a
b i
ii
c i
ii
Mark
A
Acceptable answers
M1
(electron)
1/1836 / negligible
M2
M3
M4
M1
M2
M1
M1
M1
(neutron)
0
(proton)
1
(proton)
+1
(number of) protons and neutrons
35
18
5
isotopes
Notes
Total
Accept value in range
1/2000 to 1/1800 and
0.0005 to 0.00056
Ignore zero
1
1
1
1
1
1
1
1
1
TOTAL
Question
2
a
b i
ii
iii
c
Mark
M1
M2
M1
M2
M1
M1
M2
M3
M1
M2
Acceptable answers
Notes
9
Total
white
blue
fractional
distillation
different boiling points / boiling point
of propanone lower than that of water
heat / boil
propanone boils/collects (first)
stop collecting liquid above 56 ¡ãC
Accept wording that
indicates
that
water
collected separately or
not at all
cross in column 1 box 4
cross in column 2 box 2
1
1
1
1
1
TOTAL
10
1
1
1
1
1
Question
3
a
Mark
M1
M2
M1
M2
M1
M2
b
c
Acceptable answers
Notes
Total
loses an electron/electrons
Na+
gains two electrons
O2?
sodium oxide
Na2O
1
1
1
1
1
1
TOTAL
Question
4
a
b i
c
Mark
M1
M2
M1
ii
iii
M1
M1
i
ii
M1
M2
M1
iii
M1
4335_2H Nov 2009
Acceptable answers
Notes
6
Total
(bromine)
liquid
grey / black
any indication of chlorine in left hand
tube
hydrogen / H2
brine / sodium chloride solution / Accept
NaCl(aq)
concentrated/saturated
NaCl
Ignore sea water
chlorine
+
sodium bromide
¡ú M1
reagents
M2
products
bromine + sodium chloride
displacement / redox
Accept
reduction
/
oxidation
Ignore substitution
(chlorine)
more
reactive
(than
bromine)
1
1
1
TOTAL
9
4
1
1
2
1
1
Question
5
Mark
a
M1
b
M1
c
d
e
M1
M1
M1
M2
f
M1
M2
g
i
ii
M1
M1
iii
M1
Acceptable answers
Notes
Total
double bond / C=C / not all bonds are
single
contains
bromine
/
another
element/atom does not contain only
carbon and hydrogen
B and E
A and B / A and E / C and F
alkane(s)
CnH2n+2
Accept other symbols
such as x
yellow / orange / brown
colourless / decolorised
Ignore clear
If only colourless stated,
assume it is final colour
F
poly(ethene)
/
polyethene
/
polythene
addition
1
TOTAL
11
1
1
1
1
1
1
1
1
1
1
SECTION A TOTAL: 45 MARKS
4335_2H Nov 2009
5
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