chemistry

1 the arrangements of particles in solids, liquids and gases are different.
which statement about the molecules in ice, water or steam is correct?
a the h20 molecules are on average closest together in steam.
b the h20 molecules are on average furthest apart in water.
c the h20 molecules in steam have the second highest average velocity.
d the h20 molecules in ice are able to vibrate.

2 the melting points and boiling points of three elements, at 1 atm pressure, are shown.
melting point boiling point
°c °c
argon -189 -186
nitrogen -210 -196
oxygen —218 -183
separate samples of argon, nitrogen and oxygen are stored at —200°c and at 1 atm pressure.
how many samples are liquids?
a 0 b 1 cc 2 d 3

3 which statement describes a compound?
a it contains two or more elements chemically combined.
b__ it contains two or more elements physically combined.
c_ it contains two or more elements forming an alloy.
d_ it contains two or more elements that can easily be separated.

4 which statement about elements in the periodic table is correct?
a_ apotassium ion, k’, has the same electronic configuration as a chloride ion, cl.
b_ the electronic configuration of a ca** ion is 2,8,8,2.
c_ the halogens are in group vi and so their atoms have six electrons in their outer shell.
d magnesium is in period 3 and so a magnesium ion, mg", has three occupied electron shells.

5 which statement about ions and ionic bonds is correct?
a_ bromine atoms form negatively charged bromide ions.
b__lonic bonds form between elements in group vii of the periodic table.
c_ positive ions are formed when atoms lose protons.
d_ potassium iodide contains negatively charged potassium ions.

6 which molecule has only two shared pairs of electrons?
a ch, b cl, c hcl d h2,0

7 which statement about graphite explains why it is used as an electrode?
a it contains ions.
b_ it has a giant covalent structure.
c_ itis a metal.
d_ it has mobile electrons.

8 methane, ch,, burns in air to form carbon dioxide and water.
what is the balanced equation for this reaction?
a cha(g) + o2(g) > co2(g) + 2h20(g)
b  cha(g) + 202(9) > co2(g) + 2h20(g)
c ch,(g) + 202(g) > co2(g) + h20(g)
d cha(g) + 302(9) > co2(g) + 2h20(g)

9 magnesium reacts with steam.
mg + h,0 + mgo + hp
when 2.43g of magnesium reacts with an excess of steam, the products are 4.03g of
magnesium oxide and 0.20 g of hydrogen.
what is produced when 7.29 g of magnesium reacts with an excess of steam?
a 1.34g of magnesium oxide and 0.07 g of hydrogen
b  4.03g of magnesium oxide and 0.20g of hydrogen
c_ 8.06g of magnesium oxide and 0.40g of hydrogen
d 12.09g of magnesium oxide and 0.60 g of hydrogen

10 the diagram shows an electrolysis circuit.
at which electrode is hydrogen formed?
; ~ 1
+ = + =
a b cc d
aqueous molten
sodium chloride sodium chloride

11 which gases are used to generate electricity in a fuel cell?
a carbon dioxide and oxygen
b_ hydrogen and methane
c hydrogen and oxygen
d_ methane and carbon dioxide

12 the reaction pathway diagram for a reaction is shown.
products
energy
reactants
progress of reaction

which statements about the reaction are correct?

1 the reaction is endothermic.

2 the reaction is exothermic.

3 the diagram represents the combustion of methane.

4 the diagram represents the thermal decomposition of limestone.
a iand3 b 1and4 c 2and3 d 2and4

13. which row describes a chemical change?
[| oa
are made change of state
a always always
b always sometimes
cc never always
d never sometimes

14 magnesium powder reacts with an excess of dilute hydrochloric acid to produce hydrogen gas.
which statements about this reaction are correct?
1 the smaller the particles of magnesium powder, the more slowly the hydrogen is
produced.
2 the higher the temperature, the faster the magnesium powder disappears.
3 the lower the concentration of dilute hydrochloric acid, the faster the rate of
reaction.
4 the faster the magnesium powder disappears, the faster the rate of reaction.
a iand2 b 2and3 c 2and4 d 3and4

15 which statement about hydrated cobalt(ii) chloride is correct?
a it turns blue when it is heated.
b it turns blue when water is added to it.
c_ it turns pink when water is added to it.
d it turns white when it is heated.

16 an aqueous solution reacts with a solid. the products are an alkaline gas, a salt and water.
what are the aqueous solution and the solid?
[| aaueoussotion [sald
a sodium hydroxide magnesium carbonate
b hydrochloric acid magnesium carbonate
cc hydrochloric acid ammonium chloride
d sodium hydroxide ammonium chloride

17 both calcium oxide, cao, and calcium hydroxide, ca(oh)2, are used to remove sulfur dioxide,
sox, from flue gases in industrial plants.
which row classifies calcium oxide, calcium hydroxide and sulfur dioxide?
| | calcium oxide | calcium hydroxide sulfur dioxide
a acidic acidic basic
b acidic basic acidic
cc basic acidic acidic
d basic basic acidic

18 copper(ii) sulfate is prepared by adding excess copper(ii) carbonate to sulfuric acid.
why is an excess of copper(ii) carbonate added?
a to ensure all the copper(ii) carbonate has reacted
b to ensure all the sulfuric acid has reacted
c_toincrease the rate of reaction
d_ to increase the amount of copper(ii) sulfate produced

19 part of the periodic table is shown.
which element has two electrons in its outer shell and three electron shells?
lj [|
[a |b ft ty ty
| ic! pt jo)
piety ett tt ee tt et tt ty
pet tt tt ty te ee te ee tt ty

20 some information about element x is given.

e melting point = 64°c
e density = 0.86 g/cm®
e vigorous reaction with water

where in the periodic table is x placed?

a group 0

b- group |

c_ group vii

d transition metals

21 the properties of the element titanium, ti, can be predicted from its position in the periodic table.
which row identifies the properties of titanium?
can be conducts forms
aa has

used as electricity low densi coloured

a catalyst when solid y compounds
a v v v x
b v v x v
cc v x v v
d x v v v

22 which description of brass is correct?
a acompound of copper and zinc
b  acompound of copper and tin
c  amixture of copper and zinc
d  amixture of copper and tin

23 what is the symbol of the metal used in the manufacture of aircraft because of its low density?
a al b cu c fe d zn

24 which property of stainless steel makes it suitable for making cutlery?
a_ it conducts electricity.
b_ it has a high melting point.
c_itis resistant to rusting.
d_itis ductile.

25 which substances react to form hydrogen gas?
1 calcium and water
2 __ silver and dilute hydrochloric acid
3 magnesium and steam
4 zinc and dilute hydrochloric acid
a 1,3 and4 b 1tand3only c 2and4 d 4only

26 some statements about the reactions of the metals tin, lithium and manganese are listed.
e tin does not react with steam but does react with dilute hydrochloric acid.
e lithium reacts with cold water.
e manganese does not react with cold water but does react with steam.
what is the order of reactivity of the three metals?
least most
* —_—_—— -
reactive reactive
a lithium manganese tin
b tin lithium manganese
cc manganese tin lithium
d tin manganese lithium

27 which substances are required for iron to rust?
a_ oxygen and salt
b oxygen only
c_ water and oxygen
d_ water and salt

28 coke (carbon) and limestone are two raw materials used in the extraction of iron from hematite.
which type of reaction occurs when each substance is heated during the process?
[ke insone

a redox redox
b redox thermal decomposition
cc thermal decomposition redox
d thermal decomposition thermal decomposition

29 water is treated at a waterworks to make it safe to drink.
what is present in the water when it leaves the waterworks?
a bacteria and insoluble substances
b bacteria only
c soluble substances, including chlorine compounds
d_ chlorine compounds only

30 the formulae of four compounds, w, x, y and z, are given.
ww feso,
xx (nh4)3po4
y kno3
z nacl
which compounds are mixed to create a fertiliser containing the three elements necessary for
improved plant growth?
a wandx b wandz c xandyy d yandz

31 some combustion reactions produce pollutant gases.
which reactions produce a pollutant gas that is not present in clean air?
1 2chs, + 302 — 2co + 4h20
2 2h. + o2 > 2h20
3 c+ o2. > co,
4 ne + o2 > 2no
a iand3 b 1and4 c 2and3 d 3and4

32 which row identifies the homologous series to which the molecular structure belongs?
([—roecerstucie [homeless srs |
lirica
a eee eee alkane
h h h h hh
ll
b een alkene
h h
h h fe)
| | 7
cc h—c—c—c alcohol
| | \
h h oh
iti
d nn nn carboxylic acid
h h h h

33 petroleum is fractionally distilled at an oil refinery.
the table shows some fractions and uses.
| taaton [se |

1 gasoline fuel for ships
2 refinery gas lubrication
3 naphtha making chemicals
4 kerosene jet fuel

which rows identify a use for the fraction listed?

a iand2 b 1and3 c 2and4 d 3and4

34 what is the word equation for the preparation of ethanol?
a_ glucose > ethanol + carbon dioxide
b_ glucose + yeast — ethanol + water
c_ ethane + water —> ethanol
d_ ethene + water —> ethanol + carbon dioxide

35 which row describes properties of aqueous ethanoic acid?
h effect of adding effect of adding
p magnesium sodium carbonate
a 1 reacts to form reacts to form carbon dioxide
hydrogen and water only
b 4 reacts to form reacts to form a salt,
hydrogen carbon dioxide and water
cc 5 no reaction reacts to form a salt,
carbon dioxide and water
d 8 no reaction reacts to form carbon dioxide
and water only

36 which row describes the relative sizes of monomer and polymer molecules?
[ [monomer | poner
a large large
b large small
cc small large
d small small

37 2.00g of powdered calcium carbonate is added to 50.0 cm’ of hydrochloric acid.
which apparatus is used to measure these quantities of calcium carbonate and
hydrochloric acid?
a balance burette
b balance thermometer
c pipette burette
d pipette thermometer

38 the diagram shows a chromatogram obtained from the colours of three different sweets, x, y
and z.
@ red @ red
@ yellow @ yellow @ yellow
@ red @ red
sweet x sweet y sweet z
how many different red dyes are present in the sweets?
a 1 b 2 cc 3 d 4

39 a mixture contains sand and an aqueous solution of sodium chloride.
which processes are used to obtain a sample of solid sand and a sample of solid
sodium chloride from the mixture?
a crystallisation followed by filtration
b_ evaporation followed by filtration
c filtration followed by crystallisation
d _ simple distillation followed by crystallisation

40 a student tests an unknown compound m.
the compound:
e produces a lilac flame using a flame test
e@ produces a gas which turns limewater cloudy when dilute hydrochloric acid is added.
what is m?
a sodium sulfate
b_ sodium carbonate
c potassium sulfate
d_ potassium carbonate

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