Chemistry Higher level Paper 1 - IB Documents

[Pages:17]M17/4/CHEMI/HPM/ENG/TZ2/XX

Chemistry Higher level Paper 1

Thursday 11 May 2017 (afternoon)

1 hour

Instructions to candidates ? Do not open this examination paper until instructed to do so. ? Answer all the questions. ? For each question, choose the answer you consider to be the best and indicate your choice on

the answer sheet provided. ? The periodic table is provided for reference on page 2 of this examination paper. ? The maximum mark for this examination paper is [40 marks].

17 pages

2217?6113 ? International Baccalaureate Organization 2017

1

2

3

4

5

The Periodic Table

6

7

8

9

10

11

12

13

14

15

16

17

18

1

1H 1.01

3

4

2 Li

Be

6.94 9.01

Atomic number Element

Relative atomic mass

2

He 4.00

5

B 10.81

6

C 12.01

7

N 14.01

8

O 16.00

9

F 19.00

10

Ne 20.18

11

12

3 Na Mg

22.99 24.31

13

Al 26.98

14

Si 28.09

15

P 30.97

16

S 32.07

17

Cl 35.45

18

Ar 39.95

19

20

21

22

4K

Ca

Sc

Ti

39.10 40.08 44.96 47.87

23 V 50.94

24 Cr 52.00

25

Mn 54.94

26

Fe 55.85

27 Co 58.93

28 Ni 58.69

29 Cu 63.55

30 Zn 65.38

31

Ga 69.72

32

Ge 72.63

33 As 74.92

34 Se 78.96

35 Br 79.90

36

Kr 83.90

37

38

39

40

5 Rb

Sr

Y

Zr

85.47 87.62 88.91 91.22

41

Nb 92.91

42

Mo 95.96

43

44

45

46

47

48

49

50

51

52

53

54

Tc

Ru Rh

Pd

Ag Cd

In

Sn

Sb

Te

I

Xe

(98) 101.07 102.91 106.42 107.87 112.41 114.82 118.71 121.76 127.60 126.90 131.29

55

56 57 72

73

6 Cs

Ba

La

Hf

Ta

132.91 137.33 138.91 178.49 180.95

74

75

76

77

78

79

80

81

82

83

84

W

Re

Os

Ir

Pt

Au Hg

Tl

Pb

Bi

Po

183.84 186.21 190.23 192.22 195.08 196.97 200.59 204.38 207.2 208.98 (209)

85 At (210)

86 Rn (222)

87

88 89 104

7 Fr

Ra

Ac

Rf

(223) (226) (227) (267)

105

Db (268)

106

Sg (269)

107

Bh (270)

108

Hs (269)

109

Mt (278)

110

Ds (281)

111

Rg (281)

112

Cn (285)

113

Unt (286)

114

Uug (289)

115

Uup (288)

116

Uuh (293)

117

Uus (294)

118

Uuo (294)

? 2 ?

M17/4/CHEMI/HPM/ENG/TZ2/XX

58

59

Ce

Pr

140.12 140.91

60

Nd 144.24

61

Pm (145)

62

63

64

65

66

67

68

69

70

71

Sm Eu

Gd

Tb

Dy

Ho

Er

Tm

Yb

Lu

150.36 151.96 157.25 158.93 162.50 164.93 167.26 168.93 173.05 174.97

90

91

Th

Pa

232.04 231.04

92

U 238.03

93

Np (237)

94

Pu (244)

95

Am (243)

96

Cm (247)

97

Bk (247)

98

Cf (251)

99

Es (252)

100

Fm (257)

101

Md (258)

102

No (259)

103

Lr (262)

? 3 ?

M17/4/CHEMI/HPM/ENG/TZ2/XX

1. What is the sum of the coefficients when the equation is balanced with whole numbers?

A. 26.5

--C8H18(g) + --O2(g) --CO(g) + --H2O(l)

B. 30

C. 53

D. 61

2. What is the maximum volume, in dm3, of CO2(g) produced when 1.00g of CaCO3(s) reacts with 20.0cm3 of 2.00moldm-3 HCl(aq)?

CaCO3(s) + 2HCl(aq) CaCl2(aq) + H2O(l) + CO2(g) Molar volume of gas = 22.7dm3mol-1; Mr(CaCO3) = 100.00

A. 1 ? 20.0 ? 2.00 ? 22.7

2

1000

B. 20.0 ? 2.00 ? 22.7 1000

C.

1.00 ? 22.7

100.00

D.

1.00 ? 2 ? 22.7

100.00

3. Which factors affect the molar volume of an ideal gas?

I. Pressure II. Temperature III. Empirical formula

A. I and II only

B. I and III only

C. II and III only

D. I, II and III

Turn over

? 4 ?

M17/4/CHEMI/HPM/ENG/TZ2/XX

4. Which electron transition emits radiation of the longest wavelength?

n = 5 n = 4

n = 3

D C

n = 2

B A

n = 1

5. X, Y and Z represent the successive elements, Ne, Na and Mg, but not necessarily in that order.

First ionization energy / kJmol-1

X

2081

Y

496

Z

738

What is the order of increasing atomic number?

A. X < Y < Z

B. X < Z < Y

C. Y < Z < X

D. Y < X < Z

6. Which property increases down Group 1, the alkali metals? A. Atomic radius B. Electronegativity C. First ionization energy D. Melting point

7. Which element is a lanthanide? A. Hf B. Tb C. U D. Y

? 5 ?

M17/4/CHEMI/HPM/ENG/TZ2/XX

8. Ammonia is a stronger ligand than water. Which is correct when concentrated aqueous ammonia solution is added to dilute aqueous copper(II) sulfate solution? A. The d-orbitals in the copper ion split. B. There is a smaller splitting of the d-orbitals. C. Ammonia replaces water as a ligand. D. The colour of the solution fades.

9. How many bonding electrons are there in the urea molecule? H2N CO H2N

A. 8 B. 16 C. 20 D. 24

10. Which does not show resonance? A. PO43B. C6H6 C. C6H12 D. O3

Turn over

? 6 ? 11. Which metal has the strongest metallic bond?

A. Li B. Na C. K D. Rb

M17/4/CHEMI/HPM/ENG/TZ2/XX

12. Which is the first step in the CFC-catalysed destruction of ozone in UV light? A. CCl2F2 CClF2+ + ClB. CCl2F2 CClF2 + Cl C. CCl2F2 CCl2F+ + FD. CCl2F2 CCl2F + F

13. Which statement is correct? A. Sigma bonds are formed only by the combination of s atomic orbitals. B. Pi bonds can be formed in the absence of sigma bonds. C. Pi bonds are formed parallel to the axis between atoms. D. Pi bonds are formed only by the combination of hybrid orbitals.

? 7 ? 14. What can be deduced from this reaction profile?

M17/4/CHEMI/HPM/ENG/TZ2/XX

Reactants

Enthalpy

Products

Reaction coordinate A. The reactants are less stable than the products and the reaction is exothermic. B. The reactants are less stable than the products and the reaction is endothermic. C. The reactants are more stable than the products and the reaction is exothermic. D. The reactants are more stable than the products and the reaction is endothermic.

15. What can be deduced from the facts that ozone absorbs UV radiation in the region of 340nm and molecular oxygen in the region of 242nm? A. The bond between atoms in molecular oxygen is a double bond. B. The bonds in ozone are delocalized. C. The bonds between atoms in ozone are stronger than those in molecular oxygen. D. The bonds between atoms in molecular oxygen need more energy to break.

Turn over

? 8 ?

M17/4/CHEMI/HPM/ENG/TZ2/XX

16. The Born-Haber cycle for potassium oxide is shown below: 2K+(g) + O2-(g)

+612kJ 2K+(g) + 2e- + O(g)

+838kJ 2K(g) + O(g)

+428kJ

2K(s) +

1 2

O2(g)

lattice enthalpy

-361kJ

K2O(s)

Which expression represents the lattice enthalpy in kJmol-1? A. -361 + 428 + 838 + 612 B. -(-361) + 428 + 838 + 612 C. -361 + 428 + 838 - 612 D. -(-361) + 428 + 838 - 612

17. Which ion's hydration energy is the most exothermic? A. Li+ B. Na+ C. BrD. I-

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