Ucles gce ordinary level chemistry paper 1 june 2000

UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE
General Certificate of Education Ordinary Level
CHEMISTRY
MAY/JUNE SESSION 2000
Mathematical tables and/or calculatorMultiple choice answer sheetSoft clean eraserSoft pencil (type B or HB is recommended) INSTRUCTIONS TO CANDIDATES
Do not open this booklet until you are told to do so.
Write your name, Centre number and candidate number on the answer sheet in the spaces providedunless this has already been done for you.
There are forty questions in this paper. Answer all questions. For each question, there are four
possible answers, A, B, C and D. Choose the one you consider correct and record your choice in soft
pencil on the separate answer sheet.
Read very carefully the instructions on the answer sheet.
INFORMATION FOR CANDIDATES
Each correct answer will score one mark. A mark will not be deducted for a wrong answer.
Any rough working should be done in this booklet.
Mathematical tables are available. You may use a calculator.
A copy of the Periodic Table is printed on page 16.
This question paper consists of 14 printed pages and 2 blank pages.
[Turn over
By which process does the smell of cooking spread to all the rooms in a house? Trichloroethane is a solvent used to remove grease from clothing.
How, after use, is the solvent separated from the grease? The diagram shows a chromatogram of several inks.
Black ink can be made by mixing green, red and yellow inks.
Brown ink can be made by mixing blue and red inks.
Yellow ink can be used to make brown ink.
Yellow ink may be present in green ink.
Which graph shows the temperature altering as steam at 110 °C is cooled to –10 °C? Elements X, Y and Z are in the same period of the Periodic Table.
X is a metal, Y is a non-metal and Z shows properties of both metals and non-metals.
What is the order of increasing proton (atomic) number? All the elements have only one nucleon (mass) number.
The nucleon (mass) number can be less than the proton (atomic) number.
The nucleon (mass) number can equal the proton (atomic) number.
The number of neutrons never equals the number of electrons.
In which pair of substances is each substance a mixture? [Turn over
Elements X and Y react to form an ionic compound of formula XY.
What could be the proton (atomic) numbers of X and Y? Which of the following contains the same number of molecules as 9 g of water? Ca(s) + 2H O(l) → Ca(OH) (aq) + H (g) What is the total mass of the solution that remains when 40 g of calcium reacts with 100 g ofwater? The diagram shows the apparatus used to electrolyse lead(II) bromide using inert electrodes.
Why does the lamp light up only when the lead(II) bromide is melted? Bromine atoms in the lead(II) bromide are converted to ions when it is melted.
Electrons flow through the lead(II) bromide when it is melted.
The ions in lead(II) bromide are free to move only when the solid is melted.
There are no ions in solid lead(II) bromide.
The diagram shows the results of an electrolysis experiment using inert electrodes.
Which of the following could be liquid X?
In an experiment, rods of copper and zinc are dipped into dilute sulphuric acid, with their top endstouching. Hydrogen bubbles collect around the copper rod.
Which statement is correct about the experiment? The zinc becomes coated with copper.
The zinc is less reactive than copper.
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Curve I is obtained by observing the decomposition of 100 cm3 of 1 mol/dm3 aqueous hydrogenperoxide, catalysed by manganese(IV) oxide.
volume of
oxygen
formed
Which alteration to the conditions will produce curve II? adding some 0.1 mol/dm3 aqueous hydrogen peroxide In which stage in the manufacture of pure silicon is silicon oxidised? In which reaction does the oxidation state of iron remain unchanged? Fe O + 6HCl → 2FeCl + 3H O Which household substance will neutralise a bee sting? Which equation represents the neutralisation of dilute sulphuric acid by aqueous sodiumhydroxide? The diagram shows some reactions of copper compounds.
Why does the colour of aqueous potassium bromide change when chlorine gas is bubbled into it? A compound is formed between chlorine and bromine.
A solution of potassium chloride is formed.
The chlorine oxidises bromide ions to bromine.
[Turn over
Which list contains three elements that all exist as diatomic molecules at room temperature? Which statement shows that iron is a transition metal? Iron(II) sulphate crystals are green.
Iron reacts with dilute hydrochloric acid.
Which carbonate decomposes on heating to give a black solid and a colourless gas? Which substance is not an essential raw material in the extraction of iron in a blast furnace?
Three experiments to investigate the reactivities of three metals are shown.
What is the correct order of reactivity for these three metals? Which element is liberated at a carbon cathode when aqueous sodium chloride is electrolysed? Which element reacts with oxygen to form a compound that is a gas at room temperature? Which ion reacts with aqueous ammonia to give a precipitate that dissolves in an excess ofammonia? In which reaction does dilute sulphuric acid act as an oxidising agent? [Turn over
Which of the following is composed of silicon dioxide? The diagram shows, by percentages, the principal large-scale uses of chlorine.
making hydrogenchloride anddomestic bleaches What is the total pecentage of chlorine used in making organic compounds? Which product is not manufactured using calcium carbonate?
Which pair of structures are isomers of each other? The diagrams show the structures of three hydrocarbons.
Which statement is correct for all three compounds?
They have the same physical properties.
[Turn over
The diagram represents an organic compound that contains three different elements.
Which of the following reacts with sodium carbonate to produce carbon dioxide? One mole of a hydrocarbon X reacted completely with one mole of hydrogen gas in the presence
of a heated catalyst.
What could be the formula of X?
Nylon (a polyamide) and Terylene (a polyester) are both man-made fibres.
Which type of reaction is used to produce both of these polymers? A carbohydrate such as starch can be represented as follows.
What is X?
Part of a polymer molecule has the following structure.
––CH ––CH ––CH ––CH ––CH ––CH –– From which substance is this polymer made? BLANK PAGE
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l ine
l
l
Pd alladium
le of the Elements
Co Cobalt
Os Osmium

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