You should spend a maximum of 40 minutes on this section.

Write your answer to each question in the box provided.

Answer all the questions.

1 Which feature of the structure of the atom was deduced from the Geiger and Marsden

experiment?

A Atoms consist of electrons, protons and neutrons.

B The nucleus is small and dense.

C Electrons exist in energy levels/shells.

D Electrons exist in atomic orbitals.

Your answer [1]

2 Which row gives the correct trends for the following properties of Group 2 elements and

compounds going down the Group?

First ionisation enthalpy

of element

Thermal stability

of carbonate

A Increases Increases

B Increases Decreases

C Decreases Increases

D Decreases Decreases

Your answer [1]

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3 The bar chart shows the melting points of the elements in Periods 2 and 3.

What is the correct reason for the large decrease in melting point after Group 14 in both Periods?

1000

1 2 13 14 15

Group

16 17 18

Li Na

Be

B

C

Si

N

P

O

S

F

Cl

Ne Ar

Mg Al

2000

3000

Melting

point /K

4000 Period 2

Period 3

0

A The bonding of the elements changes from metallic to covalent.

B The elements change from metals to non-metals.

C The structure and bonding of the elements change from ionic to simple molecular.

D The structure of the elements changes from giant to molecular.

Your answer [1]

4 What is the correct bond angle in the ammonia molecule?

A 90°

B 107°

C 109°

D 120°

Your answer [1]

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5 In which of the following reactions is iodine oxidised?

A 2Na + I2 2NaI

B I2 + 2e– 2I–

C I2 + 2At– At2 + 2I–

D I2 + F2 2IF

Your answer [1]

6 Which mixture forms a buffer solution?

A A mixture of a strong acid and a strong base

B A mixture of a strong acid with its salt

C A mixture of a strong base with its salt

D A mixture of a weak acid with its salt

Your answer [1]

7 What is correct about the greenhouse effect?

A Carbon dioxide is the only gas in the troposphere that acts as a greenhouse gas.

B Infrared radiation breaks bonds in molecules in the troposphere.

C The main way that the Earth is heated is by infrared radiation from the Sun.

D The Earth emits infrared radiation.

Your answer [1]

8 What is correct about nitrogen chemistry?

A The ammonia molecule has a lone pair of electrons.

B The ammonium ion has a bond angle of 120°.

C The ammonium ion has four dative covalent bonds.

D The nitrogen molecule has a double bond.

Your answer [1]

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9 Which row is correct?

Cu2+(aq) + NaOH(aq) Cu2+(aq) + NH3(aq)

A Blue precipitate soluble in excess NaOH(aq) Blue precipitate insoluble in excess NH3(aq)

B Blue precipitate insoluble in excess NaOH(aq) Blue precipitate insoluble in excess NH3(aq)

C Blue precipitate soluble in excess NaOH(aq) Blue precipitate soluble in excess NH3(aq)

D Blue precipitate insoluble in excess NaOH(aq) Blue precipitate soluble in excess NH3(aq)

Your answer [1]

10 Ammonia is manufactured using the process shown in Equation 10.1.

A high pressure and moderate temperature are used.

N2(g) + 3H2(g) 2NH3(g) ∆H = –92kJmol–1 Equation 10.1

What is correct about this manufacturing process?

A Creating a high pressure is expensive and dangerous.

B If the process were attempted at room temperature it would be quicker but give less

ammonia.

C The nitrogen gas is expensive.

D The process is beneficial to society because it removes nitrogen from the air.

Your answer [1]

11 Which of the following alcohols cannot undergo dehydration?

A CH3CH2CH2CH2OH

B (CH3)

2CHCH2OH

C (CH3)

3COH

D CH3CH(OH)CH2CH3

Your answer [1]

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12 Which equation represents the first ionisation enthalpy of phosphorus?

A P(l) P+(g) + e–

B P(s) P+(s) + e–

C P(s) P+(g) + e–

D P(g) P+(g) + e–

Your answer [1]

13 Predict which row is correct for selenium, Se.

melting

point/ °C Structure Bonding

A 217 Simple molecular Covalent

B 1026 Giant Metallic

C –101 Simple molecular Covalent

D –157 Atomic Instantaneous dipole-induced dipole

Your answer [1]

14 What is the correct order of boiling points?

A CH3CH2COOH > CH3CH2CH2OH > CH3CH2CHO

B CH3CH2COOH > CH3CH2CHO > CH3CH2CH2OH

C CH3CH2CH2OH > CH3CH2COOH > CH3CH2CHO

D CH3CH2CHO > CH3CH2COOH > CH3CH2CH2OH

Your answer [1]

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15 What is the correct Mr

 value of the organic molecule whose mass spectrum is shown below?

20

40

60

Relative intensity

80

100

0

0 15 30 45

m/ z

60 75 90

A 75

B 74

C 45

D 28

Your answer [1]

16 What is correct about the linking of DNA strands?

A Adenine forms three hydrogen bonds with thymine.

B Guanine forms three hydrogen bonds with cytosine.

C Guanine forms two hydrogen bonds with adenine.

D Uracil forms two hydrogen bonds with adenine.

Your answer [1]

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17 The Kekulé structure of benzene (C6H6) is shown below.

What is a correct statement about benzene if the Kekulé structure represented the actual

structure and bonding in benzene?

A The molecule would have a regular hexagonal shape.

B The molecule would undergo electrophilic substitution reactions.

C The molecule would form several different compounds of formula C6H4Br2.

D The molecule would decolorise bromine water.

Your answer [1]

18 A dye molecule is shown below.

HO N

N

What is correct about this dye molecule?

A Delocalisation extends over the whole dye molecule.

B The dye molecule will attach itself to fibres mainly by covalent bonds.

C Substitution of CH3 groups onto a ring will increase the solubility of the dye in water.

D Substitution of NO2 groups onto a ring will not affect the chromophore.

Your answer