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Section A (45 Marks)

A1(a) Complete the table below about the three different particles found in an atom

of element Q.

Particle Name of particle Relative charge

XElectron _

Neutron 0

proton +

(b) Non-metal because outermost shell has >3 electrons.

(c) (i)Q: 2,8 (2) O:2:8 Covalent Bond

(ii) Low melting point because intermolecular forces are weak .

[3]

[1]

[3]

[2]

2(a) 4/80X24 =1.2 dm3 [2]

(b) 4/80 X64 =3.2 g [2]

(c) 1.2/24 =0.05 moles [2]

A3(a) Barium sulphate

(b) zinc+ dilute nitric acid .

(c) water

(d) Calcium oxide

(e) Sodium hydroxide +iron(II) nitrate

(f) Ammonium sulfate [6]

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A4(a)

M-iron P-iron(II) chloride Q-iron(II)hydroxide

R-(iron(III) hydroxide S iron metal

[5]

(b) Fe + 2HCl FeCl2 + H2 [2]

(c) Test :Lighted splint

Result:Extinguished with a pop sound [2]

A5 (a) sodium (b) copper (c) magnsesium (d) zinc [4]

A6 (a) Pure water [1]

a) White precipitate [1]

b) CH4 + O2C O2 + H2O [1]

d) (i) Carbon monoxide [1]

ii) CO inhibit oxygen transport to brain [1]

A7

.

(i) Increase in temperature results in particles gaining kinetic energyAs they move faster, collisions between particles increase. ThisIncreases the chances of forming new bonds.

[2]

[2]

[2]

[Turn over

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SECTION B (10 marks each)

B1(a) Sodium Chloride ionic compound Butane organic compound-positive and negative ions - covalent bond

[5]

B1(b)i) Uranium is reactive with acids as it is above zinc. Many bubbles are expected.

(ii) Isotopes are atoms of the same element with different number of neutrons.

Protons Neutrons

Uranium 235 92 143

Uranium 237 92 145

[2]

[1]

[2]

B2(a)

(i) Stage I: fractional distillationStage II: Cracking [2]

(ii) [2]

(iii) Add bromine which turns from red to colourless indicating the presence of adouble bond.

[2]

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B2(b)

(i) .(ii) Polymer X does not conduct electricity because it has covalent bonds

which do not carry any charges

(iii) Polymer will cause land pollution /poisonous gases on combustion

[2]

[1]

[1]

B3

(a) 2 H2O2 (aq) 2 H2O (l) + O2 (g) [1]

(b) Plot the graph of total volume of oxygen against time on the graph paperprovided in the answer sheet.

Use the graph that you have plotted , to

i) estimate the missing the volume of oxygen at 60 seconds.

ii) state the total volume of oxygen produced at the end of reaction.

[3]

[1]

[1]

(c)Result: A glowing splint relights

[2]

(d) The reaction was repeated at 100C and 800C.Sketch and label on the same graph paper, the graph for the reactionscarried out for these two temperatures.

[2]

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