chemistry

1. the three rectangles show the arrangements of the particles in each of the three states of matter.
x, y and z represent the processes needed to change from one state to another.
r . y
qoooo) x oo.0q.] ————~ |o
pox xy) -—— 50k 0 =
eeeee ovo -
what are the processes x, y and z?
i ee ee
a melting condensing evaporating
b evaporating melting freezing
cc melting freezing condensing
d freezing evaporating condensing

2 which substance is a pure compound?
a. air
b_ brass
c_ ethanol
d petroleum

3 the group | element potassium forms an ionic bond with the group vii element fluorine.
which two ions are produced?
ak‘ andf* b  k* and f- c k and f d k andf*

4  anisotope of lithium has the symbol tli.
what is the arrangement of electrons in one atom of this isotope of lithium?
a b cc d

5 fluorine, f2, is in the same group of the periodic table as chlorine, cl2.
which diagram represents the arrangement of the outer-shell electrons in a molecule of fluorine?
a b
cc d

6 which use of graphite depends on the layers of carbon atoms being able to slide over each
other?
a cutting tools
b_ electrodes
c_ jewellery
d lubricant

7 which equations are balanced?
1 fe,03 + 3co + 2fe + 3coz
2 znco3 + 2hcl > zncl, + coz + 2h20
3 mg(nos3)2 + naoh — mg(oh)2 + 2nano3
4 caco3 + h,so,4 — caso, + h20 + co2
a 1and2 b 1and4 c 2and3 d 3and4

8 the equation for the combustion of methane is shown.
ch, + 202 > coz + 2h20
which mass of methane produces 36 g of water?
a 16g b 18g c 32g d 64g

9 what is produced at each electrode during the electrolysis of aqueous solutions using inert
electrodes?
[| postive etaode (eno) _| negate etecrode(eatode)
a metals or hydrogen non-metals only
b metals or oxygen non-metals only
cc non-metals only metals or hydrogen
d non-metals only metals or oxygen

10 which statement about a hydrogen-oxygen fuel cell in a car is correct?
a the fuel cell produces heat, which powers the car.
b_ the fuel cell is supplied with hydrogen directly from the air.
c_ the only emission from the fuel cell is nitrogen gas, which is non-polluting.
d_ the fuel cell produces electricity, which powers an electric motor.

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

which statements are correct?

1 the reaction is exothermic.

2 the reaction is endothermic.

3 the temperature of the surroundings increases.

4 the temperature of the surroundings decreases.
a 1and3 b 1and4 c 2and3 d 2and4

12 which process involves a chemical change?
a adding sodium to water
b _ boiling water
c_ dissolving sodium chloride in water
d producing water from aqueous sodium chloride

13 an experiment is carried out to find the rate of reaction between hydrochloric acid and zinc.
zn(s) + 2hcl(aq) > zncl2(aq) + h2(g)
the results of the experiment are shown.
y-axis |
0 :
0 time
what is the label on the y-axis?
a amount of zncl2 produced
b_ concentration of hcl
c_ mass of zn reacted
d_ volume of h2 produced

14 solid s changes colour from white to blue when water is added.
what is s?
a anhydrous cobalt(ii) chloride
b_ anhydrous copper(ii) sulfate
c hydrated cobalt(ii) chloride
d hydrated copper(ii) sulfate

15 which equation shows the reduction of copper?
a cuo + c + cu + co
b 2cus + 302 > 2cuo + 2so2
c cu(g) > cu(l)
d cu(l) > cu(s)

16 which solids react with dilute sulfuric acid to form aqueous magnesium sulfate?
1 magnesium
2 magnesium hydroxide
3 magnesium nitrate
4 magnesium oxide
a 1,2and4 b iand3 c 2,3 and4 d 2and 4 only

17. which statements about an aqueous acid are correct?
1. ammonia is formed when solid ammonium nitrate is added to an aqueous acid.
2 effervescence is seen when sodium carbonate is added to an aqueous acid.
3 methyl orange becomes yellow when added to an aqueous acid.
4 red litmus remains red when added to an aqueous acid.
a i1and3 b 1and4 c 2and3 d 2and4

18 copper(ii) sulfate is formed by reacting excess solid copper(ii) carbonate with dilute
sulfuric acid.
which processes are part of the preparation of solid copper(ii) sulfate?
1 crystallisation
2 distillation
3 filtration
4 - titration
a 1and3 b 1and4 c 2and3 d 2and4

19 element x forms ions with the formula x*.
which row describes element x?
[| aroun number | ype ofetement
a ii metal
b il non-metal
cc vi metal
d vi non-metal

20 which compound is likely to be coloured?
a kmno, b  kno3; c k,co3 d k.,so,

21 chlorine, bromine and iodine are in the same group of the periodic table.
which statements about these three elements are correct?
1 lodine is more reactive than chlorine.
2 they are diatomic covalent molecules.
3 they are all gases at room temperature.
4 their atoms have seven electrons in their outer shell.
a 1and3 b 1and4 c 2and3 d 2and4

22 the electronic configurations of four elements, p, q, r and s, are shown.
configuration

p 2
q 2,2
r 2,6
is} 2,8

which elements are unreactive monatomic gases?

a pandq b pands c qandr d_ sonly

23 the table shows some physical properties of four different substances.
which row describes the properties of a non-metallic element?
melting point conductivity conductivity
pc when solid when melted
a 63 good good
b 119 poor poor
cc 659 good good
d 808 poor good

24 the equation shows the reaction between a halogen and the aqueous ions of another halogen.
x2 + 2y° + 2x” + y2

what is x2 and the colour of y~?

p| oe | oy
a chlorine brown
b chlorine colourless
cc iodine brown
d iodine colourless

25 zinc oxide reacts with carbon to produce zinc.
which equation represents this reaction?
a 2zno0 + c + 2zn + co
b 2zno + 2c + 2zn + 2co2
c zno +c +> zn+ co
d zno + 2c > zn + 2co,

26 iron nails are stored in an airtight container.
lid
air
sos
ay iron nails
the nails begin to rust after a few days.
how can the rusting of the nails be prevented?
a leave the lid off.
b_ replace the air with argon.
c_ put the container in a warm place.
d_ seal the container in a bag.

27 four substances present in the blast furnace during iron extraction are listed.
1 calcium carbonate
2 carbon dioxide
3. carbon monoxide
4 — iron(ii) oxide
which substances are both a reactant and a product during the reactions occurring in the blast
furnace?
a i1and2 b 1and4 c 2and3 d 3and4

28 which test is used to show that a sample of water is pure?
a evaporate the water to see if any solids remain.
b_ heat the water to check its boiling point.
c_ test with anhydrous cobalt(ii) chloride.
d_ use universal indicator paper to check its ph.

29 which mixture of salts produces an npk fertiliser?
a ammonium phosphate + potassium sulfate
b_ calcium phosphate + sodium nitrate
c potassium nitrate + calcium sulfate
d sodium phosphate + ammonium nitrate

30 what are the main products obtained by the fractional distillation of liquid air?
a carbon dioxide and oxygen
b_ carbon dioxide and water vapour
c nitrogen and oxygen
d nitrogen and water vapour

31 in which reaction is the rate of reaction increased by light?
a carbon dioxide + water > glucose + oxygen
b_ethanoic acid + sodium carbonate > sodium ethanoate + water + carbon dioxide
c_ ethene + bromine > dibromoethane
d_ methane + oxygen —> carbon dioxide + water

32 the structures of three organic molecules are shown.
h h o h h h
ok ey od ep kh ge
| | ae
which description of the three molecules is correct?
| (eee ae
the same general to the same
formula, c,h2n+1oh | homologous series
a no no
b no yes
cc yes no
d yes yes

33 petroleum is separated into fractions by fractional distillation.
which row describes a use of the named fraction?
a

a bitumen fuel for ships
b refinery gas jet fuel

c fuel oil road making
d gasoline fuel for cars

34 which statement about alkanes is correct?
a they are saturated.
b_ they are very reactive.
c_ they contain carbon, hydrogen and oxygen only.
d_ they contain double bonds.

35 what is the approximate volume of nitrogen in 200 cm? of air?
a 20cm? b 40cm c 80cm d 160cm*

36 the apparatus used to investigate the rate at which hydrogen gas is given off when a piece of
magnesium reacts with dilute hydrochloric acid is shown.
a ha e hydrogen gas
magnesium and i
dilute hydrochloric acid ie 7 walter
=a
which additional piece of apparatus is needed to determine the rate of reaction?
a balance
b_burette
c _ stop-watch
d_ volumetric pipette

37 which diagram shows the displayed formula of ethanol?
a b
h o h h h
oa hk oa wh bh be yy
4 had
cc d
h h h h o
oh hk oe oo ew
4 ha

38 ethane is used as a fuel.
which equation shows the complete combustion of ethane?
a 2c2he + 702 > 4co2 + 6h20
b 2c2h, + 502 — 4co + 6h,0
c c2h, + 302 > 2coz + 2h20
d ch, + 202 > 2co + 2h,0

39 the equation for the reaction of aqueous calcium nitrate and aqueous sodium hydroxide is
shown.
ca(no3)(aq) + 2naoqh(aq) — ca(oh)2(s) + 2nano;(aq)
which process is used to remove calcium hydroxide from the mixture?
a_ chromatography
b_crystallisation
c distillation
d filtration

40 the results of two tests on aqueous compound x are given.
warm with aluminium foil and ammonia is produced
aqueous sodium hydroxide

what is x?

a __ iron(iii) nitrate

b | iron(ii) nitrate

c _iron(iii) sulfate

d iron(ii) sulfate

Solve 0620_w23_qp_11