10
CHEMISTRY
19.04.09 sundayherald
STANDARDGRADE (GENERAL) 2008
PART 1
The Periodic Table shows the names of the elements.
(b) B
1.
3. (a) C
E
F
sodium
oxygen
platinum
(b) D
D
aluminium
(c) F
lithium
(d) A and E
nitrogen
2. (a) A and C
C
(b) E
B
(c) C
A
1. (a) B and D
A
B
C
D
E
F
(b) Identify the element discovered in 1807.
You may wish to use page 8 of the data booklet to help you.
A
B
C
D
E
F
(c) Identify the element which is used as the catalyst in the Ostwald
Process.
A
B
C
D
E
F
(d) Identify the two elements which form a covalent compound.
2.
A
B
C
D
E
F
The grid shows the names of some elements.
(a) Identify the two elements whi
which exist as diatomic molecules.
A
hydrogen
A
B
helium
B
C
oxygen
C
D
silicon
D
E
carbon
E
ANSWERS
(a) Identify the two elements which have similar chemical properties.
You may wish to use page 8 of the data booklet to help you.
sundayherald 19.04.09
11
A
A Iron oxide
B
B
C
C Potassium permanganate
Silver bromide
ANSWERS
D Copper iodate
D
2.
E
Which of the following substances is a
non-conductor but becomes a good conductor
on melting?
A Solid potassium fluoride
(c) Identify the element which must be present for iron to rust.
B
Solid argon
C Solid potassium
A
3.
B
C
D Solid tetrachloromethane
Particles with the same electron arrangement
are said to be isoelectronic.
Which of the following compounds contains
ions which are isoelectronic?
D
A Na2S
E
3.
Which of the following compounds contains
both a halide ion and a transition metal ion?
B
D CaCl2
4.
V
MgCl2
C KBr
Electricity can be produced using electrochemical cells.
The graph shows the variation of
concentration of a reactant with time as a
reaction proceeds.
sodium chloride solution
metal X
metal Y
A
copper
lead
B
copper
magnesium
C
copper
copper
D
copper
nickel
Concentration/mol l
metal Y
–1
0.20
metal X
D
(b) Identify the arrangement which would produce the largest vol
largest voltage.
larg
You may wish to use page 7 of the data booklet to help you.
A
B
C
D
0.05
10
20
30
Time/s
40
50
–1 –1
0.0050 mol l s
.
C 0 0075 mol l–1 s–1
D 0.0150 mol l–1 s–1
B
A
C
0.10
What is the average reaction rate during the
first 20 s?
–1 –1
A 0.0025 mol l s
(a) Identify the arrangement which would not produce electricity.
B
0.15
0
5.
The potential energy diagram below refers to
the reversible reaction involving reactants R
and products P.
Potential
energy
–1
/kJ mol
90
80
70
60
50
R
40
30
20
10
0
CONTINUED ON NEXT PAGE
B
A
D
C
1.
1.
2.
3.
4.
HIGHER 2007
(b) Identify the element which has the electron arrangement 2,4.
You may wish to use page 1 of the data booklet to help you.
P
Reaction pathway
19.04.09 sundayherald
What is the enthalpy change, in kJ mol–1, for
the reverse reaction P → R?
A CO2
A + 30
B
6.
B
+ 10
C CCl4
D – 40
D CH4
A the formation of one mole of salt
B
the formation of one mole of water
C the neutralisation of one mole of acid
D the neutralisation of one mole of alkali.
Which equation represents the first ionisation
energy of a diatomic element, X2?
A
1
2 X2(s)
→ X+(g)
B
1
2 X2(g)
→ X–(g)
+
C X(g) → X (g)
D X(s) → X–(g)
8.
NH3
C – 10
The enthalpy of neutralisation in an acid/alkali
reaction is always the energy released in
7.
12. Which of the following compounds has polar
molecules?
Which of the following chlorides is likely to
have least ionic character?
13. How many moles of oxygen atoms are in
0.5 mol of carbon dioxide?
A 0.25
B
0.5
C 1
D 2
14. A fullerene molecule consists of 60 carbon
atoms.
atoms.
Approximately how many such molecules are
present in 12 g of this type of carbon?
A 1.0 × 1022
1.2 × 1023
C 6.0 × 1023
25
D 3.6 × 10
B
A BeCl2
B
CaCl2
C LiCl
D CsCl
9.
Which of the following chlorides is most likely
to be soluble in tetrachloromethane, CCl4?
A Barium chloride
B
Caesium chloride
C Calcium chloride
D Phosphorus chloride
10. Which of the following compounds exists as
discrete molecules?
A Sulphur dioxide
B
Silicon dioxide
C Aluminium oxide
D Iron(II) oxide
11. An element (melting point above 3000 °C)
forms an oxide which is a gas at room
temperature.
Which type of bonding is likely to be present
in the element?
A Metallic
B
Polar covalent
C Non-polar covalent
15. Avogadro’s Constant is the same as the
number of
A molecules in 16.0 g of oxygen
B
atoms in 20.2 g of neon
C formula units in 20.0 g of
hydroxide
D ions in 58.5 g of sodium chloride.
sodium
16. The equation for the complete combustion of
propane is:
C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(")
3
3
30 cm of propane is mixed with 200 cm of
oxygen and the mixture is ignited.
What is the volume of the resulting gas
mixture? (All volumes are measured at the
same temperature and pressure.)
A 90 cm
B
3
120 cm
3
C 140 cm3
D 210 cm
3
17. A mixture of carbon monoxide and hydrogen
can be converted into water and a mixture of
hydrocarbons.
nCO + (2n + 1)H2 → nH2O + hydrocarbons
D Ionic
What is the general
hydrocarbons produced?
hydrocarbons produced?
A CnH2n–2
B
CnH2n
C CnH2n+1
D CnH2n+2
formula
for
the
ANSWERS
4. C
5. C
6. B
7. C
8. A
9. D
10. A
11. C
12. B
13. C
14. A
15. B
16. C
17. D
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