chemistry

1 the melting points and boiling points of four elements are shown.
melting boiling
point/°c point/°c

ww —7 60

x -101 —34

¥' 114 184

z 39 688
in which elements do the particles vibrate about fixed positions at 0°c?
a wandx b wandz c xandy d yandz

2 which statements about clean, dry air are correct?
1 it is a mixture of elements only.
2 itis a mixture of elements and compounds.
3 it contains only non-metals.
a iand3 b 1 only c 2and3 d = 2only

3  arepresentation of an atom is shown.
o
oa8
© © oo) o09
(s)
©
what is the nucleon number of this atom?
a 6 b 7 cc 12 d 13

4 which statement describes isotopes of the same element?
a they have different electron arrangements.
b_ they have different nuclear charges.
c_ they have nuclei with masses that are the same.
d_ they have the same number of protons.

5 potassium reacts with iodine to form potassium iodide.
which statement about potassium iodide is correct?
a_ each potassium atom shares a pair of electrons with an iodine atom.
b_ in potassium iodide, the particles of potassium have more protons than electrons.
c_ potassium iodide has a high melting point because it is a covalent compound.
d_ potassium iodide has a low melting point because it is an ionic compound.

6 which row describes the properties of a simple molecular substance?
electrical

boiling point conductivity

when solid
a low poor
b high poor
cc low good
d high good

7 different forms of an element g are used as lubricants and in cutting tools.
what is the structure of g?
a giant covalent
b ionic
c_ metallic
d simple covalent

8 the diagram shows the structure of a molecule of ethyl ethanoate.
) fe)
uy
no hoh
| \ | |
nn
h h
what is the molecular formula of a molecule of ethyl ethanoate?
a cho b  cyhgo2 c c,(h2)2(o2) d c,h,o

9 the formula of a compound containing element x is na2x203.
the relative formula mass of the compound is 158.
what is the relative atomic mass of x?
a 32 b 59.5 cc 64 d 119

10 limestone is used to reduce sulfur dioxide emissions from coal-fired power stations.
the equation for the reaction is shown.
caco; + so, ~ caso; + co,
what is the smallest mass of caco; required to remove 1 tonne of so2?
a 1 tonne
b  2tonnes
c_ 64 tonnes
d100 tonnes

11. which statement about electrolysis is correct?
a_ bromine and hydrogen are formed during the electrolysis of molten lead(ii) bromide.
b_ metals are formed at the positive electrode.
c molten covalent compounds are broken down by electricity.
d platinum is used as an inert electrode.

12 which statements about hydrogen-oxygen fuel cells are correct?
1 the reaction between hydrogen and oxygen is endothermic.
2 the waste product in a hydrogen-oxygen fuel cell is water.
3. achemical reaction in the cell produces hydrogen which is used as the fuel.
4 a hydrogen-oxygen fuel cell is used to generate electricity.
a iand2 b 1and3 c 2and4 d 3and4

13. the initial and final temperatures of four different reactions are measured.
which reaction is the least exothermic?
initial final
temperature temperature
°c a @:
a 19 25
b 21 18
cc 22 lt
d 22 26

14 solid calcium carbonate reacts with dilute hydrochloric acid.
which changes to the reaction conditions increase the rate of reaction?

concentration of surface area of
hydrochloric acid calcium carbonate

a decrease decrease

b decrease increase

cc increase decrease

d increase increase

15 zinc reacts slowly with dilute sulfuric acid at room temperature.
bubbles of a gas, l, form on the surface of the zinc.
when a small amount of copper is added, the reaction is faster.
which row identifies l and explains why the reaction is faster?
[ea [meme
in reaction

a hydrogen copper acts as a catalyst

b hydrogen copper is more reactive than zinc

cc oxygen copper acts as a catalyst

d oxygen copper is more reactive than zinc

16 which reaction shows a colour change from white to blue?
a adding water to anhydrous copper(ii) sulfate
b adding water to hydrated copper(ii) sulfate
c_ heating anhydrous copper(ii) sulfate
d heating hydrated copper(ii) sulfate

17 in a blast furnace, iron(iii) oxide is converted to iron and carbon monoxide is converted to
carbon dioxide.
fe203 + 3co + 2fe + 3cq2
what happens to each of these reactants?
a both iron(iii) oxide and carbon monoxide are oxidised.
b_ both iron(ii) oxide and carbon monoxide are reduced.
c_iron(iii) oxide is oxidised and carbon monoxide is reduced.
d_iron(iii) oxide is reduced and carbon monoxide is oxidised.

18 which products are formed when magnesium carbonate reacts with dilute hydrochloric acid?
a carbon dioxide, hydrogen and magnesium chloride
b_ carbon dioxide and magnesium chloride only
c_ carbon dioxide, water and magnesium chloride
d_ water and magnesium chloride only

19 which element forms an oxide that reacts with an aqueous solution of a base?
a argon
b © sulfur
c magnesium
d copper

20 which salt is insoluble?
a barium sulfate
b_lead(ii) nitrate
c magnesium chloride
d sodium carbonate

21 some properties of element r are shown.
[metingotinc
in which part of the periodic table is r found?
a group |
b~ group vii
c_ group viii
d transition elements

22 lithium, sodium and potassium are elements in group |.

statements about these elements are listed.
1 lithium is more dense than sodium.
2 sodium is more reactive than potassium.
3 they all conduct electricity at room temperature.
4 they all react with oxygen at room temperature.

which statements are correct?

a iand2 b 1and4 c 2and3 d 3and4

23 an outline of the periodic table is shown.
which name is given to the elements in column y?
a alkali metals
b_ halogens
c noble gases
d transition elements

24 which row describes the properties of a metal that can be used in the manufacture of aircraft?
[ena [density [ cas of eanosion |
a high high corrodes easily
b high low resists corrosion
cc low high corrodes easily
d low low resists corrosion

25 which metallic element is added to iron in the manufacture of stainless steel?
a carbon
b copper
c_ lead
d nickel

26 which statement about the uses of metals is correct?
a_ aluminium is used in the manufacture of overhead electrical cables as it has a high density.
b_ aluminium is used to make food containers as it conducts electricity.
c stainless steel is used in cutlery because it is resistant to rusting.
d_ stainless steel is used to make chemical reactors because it is a soft alloy.

27 the list gives the order of some metals and hydrogen in the reactivity series.
metal x is also included.
most reactive k
mg
zn
h
x
least reactive cu
which row shows the properties of metal x?
[| sre [ar
dilute acids by carbon
a no no
b no yes
cc yes no
d yes yes

28 which gas in the air is needed for iron to rust?
a argon
b_ carbon dioxide
c nitrogen
doxygen

29 why is limestone added to the blast furnace?
a _ it neutralises the molten slag produced.
blt reacts with impurities to form slag.
c_ it releases carbon dioxide which reduces the iron(iii) oxide.
d_ it removes acidic gases such as carbon dioxide.

30 which process removes carbon dioxide from the atmosphere?
a photosynthesis
b_ thermal decomposition of calcium carbonate
c combustion of fossil fuels
d_ reaction of sodium carbonate with an acid

31 the flow chart shows stages in the treatment of river water to produce drinking water.
river sedimentation stage stage drinking
water tank j k water
what occurs at stages j and k?
pot ooe tk
a distillation chlorination
b distillation filtration
cc filtration chlorination
d filtration distillation

32 which two compounds can be mixed together to form an npk fertiliser?
a ammonium phosphate and calcium hydroxide
b_ calcium phosphate and ammonium nitrate
c potassium nitrate and calcium oxide
d__ potassium phosphate and ammonium nitrate

33 what are the main substances produced by the fractional distillation of liquid air?
a oxygen and carbon dioxide
b_ oxygen and nitrogen
c helium and nitrogen
d_ hydrogen and oxygen

34 which diagram shows the displayed formula for the named organic compound?
a b cc d
h oo h h h o—h h h
e—o-h-e——9 oh oo hh
; na sa a
ethanoic acid ethene ethanol methane

35 poly(ethene) is formed from petroleum using three separate processes.
in which order are the processes used?
a cracking — fractional distillation + polymerisation
b_ cracking > polymerisation — fractional distillation
c fractional distillation — cracking > polymerisation
d fractional distillation + polymerisation — cracking

36 gas oil and naphtha are two fractions obtained from petroleum.
what are uses of gas oil and naphtha?
[ [asset | nehthe |
a jet fuel making chemicals
b jet fuel making roads
cc diesel engine fuel making chemicals
d diesel engine fuel making roads

37 ethene can be polymerised.
which diagram represents the structure of the product formed?
a b cc d

h h h oh h oh h h h h

a | | | | | | ot
c=c c=c c—c h—c—c==c—c—h

/ on | | | | | | | |

h h h hla h h]y h h h h

38 an acid-base titration is described.

e  25.0cm* of dilute aqueous alkali is put into a conical flask.
e indicator is added to the flask.
e dilute acid is added to the aqueous alkali until the indicator changes colour.
e the volume of acid used is then recorded.

which use of apparatus is correct?

a_ the 25.0cm? of aqueous alkali is measured using a volumetric pipette.

b_ the 25.0cm? of aqueous alkali is measured using the lines on the conical flask.

c_ the volume of acid is measured using a measuring cylinder.

d_ the volume of acid is measured using a volumetric pipette.

39 the apparatus shown is used to separate a mixture.
heat
what is the mixture?
a_ anhydrous copper(ii) sulfate and hydrated copper(ii) sulfate
b_ sodium chloride and sand
c_ ethanol and methanol
d iron and steel

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