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WorksheetsPenang Trial Exam Chemistry Paper 1
Total questions: 50
Worksheet time: 2hrs 24mins
Diagram 1 shows a model of atom.
Who discovered X?
John Dalton
Sir Joseph John Thomson
Niels Bohr
Sir James Chadwick
Which of the following sets of elements consist of all non metals?
Chlorine, nitrogen and sulphur
Oxygen, hydrogen and lithium
Phosphorus, lead and carbon
Carbon, iodine and calcium
Diagram 2 shows the method used to store an element.
Which of the following explains why the method is used?
To avoid reaction with sunlight.
To prevent the element from reacting with oxygen
The element is acidic.
The element is volatile.
What is formed when an atom receives electron?
Anion
Cation
Ionic bond
Covalent bond
Which of the following is an electrolyte?
Molten glucose
Ammonia gas
Nitric acid
Copper metal
Which of the following is true about isotopes?
Similar physical properties
Similar chemical properties
Similar density
Similar stability
Which of the following is correct about weak alkaline solution?
Have pH value of 13
Partially ionised in water
Concentration of the solution is low
Solution does not react with acid
A decorative glassware maker encountered a problem with his products which are fragile. He needs another material which is transparent but not fragile to replace glass. What is the most suitable material?
Polyethene
Polypropene
Polychloroethene
Polymethylmethacrylate
What are the products formed when ethene is burnt in excess oxygen?
I Water
II Carbon
III Carbon dioxide
IV Carbon monoxide
I and II
I and III
II and IV
III and IV
Which of the following is salt?
Potassium chloride
Sodium hydroxide
Hydrogen chloride
Sodium oxide
Which of the following reactions is endothermic reaction?
2KOH + H2SO4 → K2SO4 + 2H2O
Mg + 2HCl → MgCl2 + H2
CaCO3 + 2HCl → CaCl2 + H2O + CO2
6CO2 + 6H2O → C6H12O6 + 6O2
Which salt can be prepared through double decomposition reaction?
Lead (II) nitrate
Barium sulphate
Silver sulphate
Calcium chloride
Information below shows the characteristics of cell V.
-Portable
-Stable voltage
-Rechargeable
-Costs more than dry cell
What is cell V?
Daniell cell
Mercury cell
Alkaline cell
Nickel-Cadmium cell
Which of the following chemical equations is not a redox reaction?
Ag+ + Cl- → AgCl
Cl2 + S2- → 2Cl- + S
2Fe3+ + Zn → 2Fe2+ + Zn2+
Mg + Cu2+ → Mg2+ + Cu
Diagram 3 shows the effect of a weight that is dropped onto a composite substance and its original components.
What is the characteristic of the composite substance?
Strong and hard
Hard and ductile
Strong and elastic
Elastic and ductile
Table 1 shows the total volume of hydrogen gas collected at regular intervals of the reaction between zinc, Zn and dilute hydrochloric acid, HCl.
What is the average rate of reaction in the first 20 seconds?
2.1 cm3s -1
8.4 cm3s -1
21.0 cm3s -1
84.0 cm3s -1
Which of the following substances can be used to differentiate ethane and ethene?
Bromine water
Lime water
Dilute sulphuric acid
Sodium hyroxide solution
Diagram 4 shows a label on a bottle of an orange juice.
X is one of the important ingredients to make orange juice last longer. What is X?
Sodium nitrite
Sodium nitrate
Benzoic acid
Sulphur dioxide
An ionic compound is formed from element P in Group 13 and element Q in Group 16. What is the molecular formula of the compound?
P3Q2
PQ3
P3Q
P2Q3
Diagram 5 shows a cold pack.
When the cold pack is squeezed, a plastic tube containing ammonium nitrate breaks and mixes with water inside the pack. The pack instantly gets cold.
Which of the following sunstances is suitable to replace ammonium nitrate to obtain the same reaction?
Calcium oxide
Magnesium sulphate
Copper(II) chloride
Ammonium chloride
Diagram 6 shows a graph of the temperature against time for a sample of lead solid.
Which of the labelled parts represent the melting process?
W
X
Y
Z
What is the period for an element with proton number 20?
5
4
3
2
Which is true about the physical properties of ionic compounds?
Dissolve in water and do not conduct electricity
Dissolve in water and conduct electricity in molten or aqueous states only
Dissolve in methylbenzene and do not conduct electricity
Dissolve in methylbenzene and conduct electricity in molten or aqueous states only
Which of the following are the isomers of butene?
I and III only
II and IV only
I, II and III only
II, III and IV only
Which of the following is true about soap or detergent?
Detergent forms scum in hard water
Scum decreases the effectiveness of the cleaning action of a soap
Soap forms scum in soft water
The presence of magnesium ions in detergent forms scum
Which of the following chemical equation shows the reaction to obtain copper (II) sulphate salt?
I H2SO4 + CuO → CuSO4 + H2O
II H2SO4 + Cu → CuSO4 + H2
III H2SO4 + CuCO3 → CuSO4 + H2O + CO2
IV H2SO4 + Cu(OH)2 → CuSO4 + 2H2O
I and II only
II and IV only
I and III only
II, III and IV only
Diagram 7 shows the apparatus set-up used to investigate the reaction of iron(III) nitrate solution with potassium iodide solution.
Which is the correct observation for the two solutions?
A
B
C
D
The following equation shows a combustion reaction of ethanol.
C2H5OH + 3O2 2CO2 + 3H2O, ∆H = -1266 kJmol-1
Which of the following energy level diagrams represents the reaction?
The ionic equation below represents the reaction between sodium thiosulphate solution and hydrochloric acid.
2H+ + S2O32− --------------> S + SO2 + H2O
Which of the following happens when the temperature of the reaction increases?
The number of collision between hydrogen ions and thiosulphate ions increases
Concentration of hydrogen ions and thiosulphate ions increases
Hydrogen ions and thiosulphate ions move slower
Activation energy of the reaction increase
Diagram 8 shows the set-up of the apparatus of a voltaic cell.
Which of the following changes can increase the reading on the voltmeter?
Change the copper plate to silver plate.
Use a more concentrated aqueous sodium chloride.
Change the zinc plate to lead plate.
Increase the volume of aqueous sodium chloride.
Copper (II) sulphate solution is added into a container made of zinc. The zinc container with its content is left for one day. Which of the following happens in the container?
Zinc atom gains electrons
Grey solid formed in the beaker
Oxidation number of copper changes from +2 to +1
Blue colour of copper(II) sulphate solution became paler
Diagram 9 shows the apparatus set-up to investigate the effect of heat on salt.
Which observation is correct?
Brown solid formed
Colourless liquid formed
White fume produced
Brown gas released
Diagram 10 shows two volumetric flasks containing solutions of sulphuric acid and HX acid.
Why is the concentration of hydrogen ions in sulphuric acid higher than in HX acid?
Sulphuric acid is a diprotic acid.
Sulphuric acid is a monoprotic acid.
Sulphuric acid is a stronger acid.
Sulphuric acid is slightly soluble in water.
Which statement explains why ionic compound has high melting point?
There are free moving ions in the compound.
Covalent bond between atoms is strong.
Electrostatic force between ions is strong.
More energy is needed to overcome the forces between molecules.
Veronal is a barbiturate used to induce sleep in psychiatric patients. The molecular formula of veronal is C8H12N2O3. Determine the relative molecular mass of veronal. (Relative atomic mass; H=1, C=12, N=14, O=16)
186
184
180
182
Diagram 11 shows curve X when 5 g granulated zinc is reacted with 50 cm3 of 1.0 mol dm-3 hydrochloric acid.
Which of the following reaction produces curve Y?
5 g zinc powder + 50 cm3 of 2 mol dm-3 of hydrochloric acid
5 g zinc powder + 50 cm3 of 1 mol dm-3 of hydrochloric acid
5 g granulated zinc + 100 cm3 of 1 mol dm-3 of hydrochloric acid
5 g granulated zinc + 50 cm3 of 2 mol dm-3 of hydrochloric acid
Diagram 12 represent the structural formula of a carbon compound
The compound is produced by the reaction between
Ethanol and propanoic acid
Propanol and ethanoic acid
Butanol and ethanoic acid
Ethanol and butanoic acid
In the Periodic Table of Elements, element Z is below element Y in the same group. Given that the proton number of atom Y is 11. Which statements are correct about elements Y and Z?
I Atoms Y and Z have the same number of shells filled with electrons.
II Atom Z losts valence electron more easily than atom Y.
III Atom Y has a bigger atomic size than atom Z.
IV Atom Y and Z have the same number of valence electron
I and II
I and III
II and IV
III and IV
Atom of element R form R 2- ions. Atom of R has a proton number of 8 and a nucleon number of 16. Which of the following is correct about R2– ion?
A
B
C
D
Ammonium sulphate, (NH4)2SO4 is an example of a fertiliser. Calculate the percentage of nitrogen in 1 mole of ammonium sulphate.
[Relative atomic mass N; = 14, H = 1, S = 32, O = 16]
12.12 %
21.21 %
23.23 %
31.31 %
When 1.52 g of a metal oxide of M is reduced, 1.04 g of the metal is obtained. Determine the empirical formula of the metal oxide. (Relative atomic mass; O=16, M=52).
MO2
M2O
M2O3
M3O2
Jane wants to make her ring more beautiful and prevent corrosion. What is the best way to achieve this?
Polish the ring with oil.
Wash the ring with soap.
Polish the ring with water
Plate the ring with gold.
20 cm3 of 0.5 mol dm-3 sodium hydroxide solution is completely neutralised by two different strong acids, HX acid and H2Y acid. The concentration of both acids is 0.5 mol dm-3 . What is the volume of HX acid and H2Y acid used?
A
B
C
D
The chemical equation below shows the reaction between calcium carbonate and hydrochloric acid.
CaCO3 + 2HCl --------------> CaCl2 + H2O + CO2
Which changes can be used to determine the rate of reaction?
Colour of the solution per unit time
Mass of precipitate produced per unit time
Concentration of hydrochloric acid per unit time.
Volume of carbon dioxide gas given off per unit time
The complete combustion of ethane gas produce carbon dioxide and water.
2C2H6 + 7O2 → 4CO2 + 6H2O
Calculate the volume of ethane needed to produce 2.2 g of carbon dioxide at standard temperatue and pressure? [molar mass CO2 = 44 g mol-1 , molar volume of gas at s.t.p = 22.4 dm3 mol-1 ]
0.56 dm3
1.00 dm3
1.12 dm3
2.24 dm3
Diagram 13 shows the energy level for the precipitation reaction of lead(II) sulphate.
Calculate the temperature change when 25 cm3 of 1 mol dm-3 lead(II) nitrate solution is added to 25 cm3 of 1 mol dm-3 potassium sulphate solution. [ Specific heat capacity of solution = 4.0 J g -1 ℃-1 , Density of solution = 1 g cm-3 ]
5.2 ℃
6.3 ℃
3.6 ℃
11.0 ℃
Table 2 shows the information about three simple cells.
What is the potential difference of the pair of metals Q and S?
3.1 V
2.6 V
0.8 V
0.5 V
Oxygen mask contains potassium oxide, K2O which reacts with water and carbon dioxide from exhaled air to produce oxygen.
4K2O + 2H2O + 4CO2 ---> 4KHCO3 + 3O2
Calculate the volume of oxygen gas at room temperature that can be produced from 47 g of potassium oxide.
(Relative atomic mass; O=16, K=39, 1 mole of gas occupies a volume of 24 dm3 at room condition)
18 dm3
12 dm3
10 dm3
9 dm3
Manganese(IV) oxide is used as the catalyst to increase the rate of decomposition of hydrogen peroxide, H2O2. Which of the following graph shows the mass of catalyst as the reaction take place?
Diagram 14 shows the cracked surface of iron.
Which of the following is incorrect about the mechanism of rusting of iron that occurs?
The oxidation reaction of iron to iron(II) ions occurs at the center of water droplet
The edge of water droplet serves as a positive terminal
At the center of the water droplet, four hydroxide ions are formed when two water molecules receive four electrons
At the center of the water droplet, an iron atom releases two electrons to form an iron(II) ion
