For Examiner’s Use 123Total
4567READ THESE INSTRUCTIONS FIRST
Write your Centre number, candidate number and name in the spaces at the top of this page.
Write in dark blue or black pen.
You may need to use a pencil for any diagrams, graphs or rough working.Do not use staples, paper clips, highlighters, glue or correction fl uid.DO NOT WRITE IN ANY BARCODES.
Answer all questions.
A copy of the Periodic Table is printed on page 20.
At the end of the examination, fasten all your work securely together.
The number of marks is given in brackets [ ] at the end of each question or part question.
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CHEMISTRY
0620/23
Paper 2
October/November 2011
1 hour 15 minutes
Candidates answer on the Question Paper.No Additional Materials are required.UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certi fi cate of Secondary Education
This document consists of 19 printed pages and 1
blank page.
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IB11 11_0620_23/FP © UCLES 2011
*1913993284*
PMT
For
Examiner’s
Use
1T he diagram shows fi ve different pieces of laboratory glassware, A, B, C, D and E.
A B C
(a)C hoose from A, B, C, D or E to answer the following questions.
E ach letter may be used once, more than once or not at all.
W hich piece of glassware is best used to
(i)m easure out a volume of liquid accurately,
(ii)p lace a spot of liquid on chromatography paper,
(iii)c ondense a liquid with a low boiling point,
(iv)s hake two solutions together to mix them,
(v)
d
eliver a variable volume of solution when performing a titration?
[5]
0620/23/O/N/11
© UCLES 2011
0620/23/O/N/11
© UCLES 2011[Turn over
For
Examiner’s
Use
T
he diagram shows the apparatus used to prepare carbon dioxide in the laboratory.
calcium carbonate
water
(i) S tate the name of a rock which is made up largely of calcium carbonate.
(1)
(ii) W hich one of these statements about carbon dioxide is correct?
T ick one box.
Carbon dioxide is lighter than air.
取笔Carbon dioxide is a liquid at room temperature.
Carbon dioxide is heavier than air.
Carbon dioxide has the same density as air.
(iii) C omplete the equation for the reaction of calcium carbonate with hydrochloric acid.
CaCO 3 + ........HC l → CaC l 2 + CO 2 + ...............
[2][Total: 9]
For
2M any of the elements in the Periodic Table are metals.
Examiner’s
Use
(a)S tate one common use for each of the following metals.大锅抗干扰
(i)copper (1)
(ii)p latinum (1)
仓库
管理流程
(iii)a luminium (1)(b)L ead is a metal in Group IV of the Periodic Table.
(i)S tate one adverse effect of lead on health.
(1)
(ii)L ead has several isotopes.
O ne isotope of lead is
207Pb
82
S tate the number of protons and neutrons in this isotope of lead.
n umber of protons (1)
n umber of neutrons (1)
(c)S odium is a very reactive metal.
(i)A student added a few drops of litmus solution to a large beaker of water. She then
dropped a small piece of sodium into the beaker.
D escribe what the student would observe during the reaction.
....................................................................................................................................
....................................................................................................................................
(3)
(ii)C omplete the word equation for the reaction of sodium with water.
sodium + water → ................................... + ...................................
(2)
© UCLES 2011
0620/23/O/N/11
0620/23/O/N/11
© UCLES 2011[Turn over
For
Examiner’s
Use
(iii) S odium chloride is formed when sodium burns in chlorine.
S odium chloride is an ionic compound. C omplete the following sentences about this reaction using words from the list.
electron gains
ion
loses
molecule negative positive proton
W hen sodium burns in chlorine, each sodium atom loses an ............................ and becomes a sodium ............................ . Each chlorine atom ............................ an electron and becomes a ............................ ion.
便当袋[4]
[Total: 15]
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