Chemistry Test Paper 15

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The atomic numbers of elements, W, X, Y and 2 are; 12, 14, 16 and 18 respectively. Which one of the elements is likely to show properties similar to an element with atomic number 10?
A. W
B.X
C. Y
D. z
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The equation that represents an oxidation — reduction reaction is
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Lead nitrate decomposes according to the equation:
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Which one of the following hydroxides dissolves in water to form an alkaline solution?
A. Potassium hydroxide
B. Zinc hydroxide
C. Lead (II) hydroxide
D. Copper (II) hydroxide
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Zinc reacts with hydrochloric acid according to the following equation:
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Which one of the following metals is extracted by electrolysis?
A. Zinc
B. Lead
C. Sodium
D. Copper
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Under a certain temperature and pressure, hydrogen reacted with nitrogen according to the equation below:
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Which one of the following substances will increase in mass when heated in air?
A. Iodine
B. Calcium
C. Zinc nitrate
D. Potassium nitrate.
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A dilute solution of sodium chloride was electrolysed using carbon electrodes. Which of the following substances was formed at the anode?
A. Chlorine
B. Carbon dioxide
C. Oxygen
D. Hydrogen chloride
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Hydrogen is used on a large-scale to
A. manufacture detergents
B harden vegetable oils
C. reduce metal oxides in extraction of metals.
D. make mining explosives.
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Beginning with the most reactive, the order of reactivity of the following metals with water is
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A chromatogram of substances P, Q, R, S, T and a mixture, M, was developed as shown in figure below,

Figure above shows that mixture, M, consists of
A. P, R and T
B. R, S and T
C. P, Q and R
D. Q, R and S
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What name is given to the reaction leading to the formation of soap from oil?
A. Hydrogenation
B. Polymerisation
C. Saponification
D. Degradation
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Which one of the following metal.? can displace zinc from zinc sulphate solution?
A. Cu
B. Pb
C. Ca
D. Ag
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A white salt, X, reacts with dilute hydrochloric acid producing brown fumes. When dilute sulphuric acid is added to the resulting solution, a white precipitate is observed. Salt X is
A. Barium nitrate
B. Sodium nitrate
C. Potassium iodide
D. Sodium bromide
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Which one of the following pairs of substances wilt produce a precipitate .when their aqueous solutions arc mixed together?
A. Sodium carbonate and ammonium sulphate
B. Nitric acid and ammonia.
C. Potassium chloride and calcium nitrate
D. Lead nitrate and sulphuric acid.
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Which one of the following salts is a fertilizer?
A. Potassium chloride
B. Calcium chloride
C. Sodium chloride
D. Copper (II) chloride
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The cation that can not be reduced by aluminium metal is
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The substance that can not cause air pollution from the following list is
A. hydrogen sulphide
B. carbon dioxide
C. water vapour
D. sulphur dioxide
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Which one of the following is not a property of ammonia? It is
A. an alkaline gas.
B. a reducing agent
C. soluble in water
D. is denser than air.
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The electronic configurations of some elements are shown below.

M 2: 6 N 2: 5 P 2: 8: 3 Z 2: 8: 2
The pair of elements that can form an ionic compound is
A. Z and M.
B. Z and P
C. Z and N
D. M and N
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The false statement about sulphur dioxide is that sulphur dioxide.
A. is a colourless gas
B. dissolves readily in water
C. turns moist red litmus to blue
D. behaves as a bleaching agent.
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The percentage by mass of phosphorus in calcium phosphate, is
A. 8
B. 10
C. 17
D. 20
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Which one of the following oxides can be reduced by dry ammonia?
A. Copper (II) oxide
B. Lead oxide
C. Zinc oxide
D. Calcium oxide.
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When 6.4 g of an oxide of element X was heated and hydrogen passed over it, 3.2g of the clement was produced. The empirical formula of the oxide is (X =32)
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Which one of the following statements about copper is untrue?
A. Hot concentrated nitric acid oxidizes copper to produce brown fumes.
B. Most compounds of copper exist when the valency of copper is 1.
C. Copper forms a basic oxide.
D. Copper is easily displaced by zinc from an aqueous solution of Cu2+.
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The incorrect statement about magnesium is that
A. is chloride is deliquescent.
B. Magnesium reacts with nitrogen.
C. Its oxide has a high melting point.
D. Magnesium is produced by electrolysis.
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The solution that could be containing zinc ions is one that forms a
A. reddish-brown precipitate with magnesium
B. green precipitate with aqueous ammonia
C. white precipitate that is soluble in excess sodium hydroxide solution.
D. White precipitate with dilute sulphuric acid.
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Ammonia burns in oxygen to yield
A. nitrogen and water
B. nitric acid
C. nitrogen and hydrogen
D. nitric acid, nitrogen and water.
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Which one of the following processes is not involved in the carbon cycle?
A. Respiration
B. Combustion
C. Photosynthesis
D. lightening
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Fuming nitric acid was healed and the gas evolved was collected over water. This gas was
A. nitrogen dioxide
B. oxygen
C. nitrogen monoxide
D. hydrogen.
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When sodium hydroxide solution was added to an aqueous solution of salt, X, a white precipitate insoluble in excess alkali was formed. X contained.
A. Lead (II) ions.
B. Magnesium ions
C. zinc ions
D. aluminium ions
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Which one of the underlined substances in the equations below is being reduced?
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The process which does not require a catalyst is the manufacture of
A. nitric acid
B. ammonia
C. sodium hydroxide
D. sulphuric acid
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Which one of the following is observed when copper (ll) sulphate is electrolysed using copper electrodes?
A. Bubbles of hydrogen gas
B. The cathode decreases in size
C. The anode decreases in size
D. The anode is coated with copper.
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ASSERTION - REASON QUESTIONS
Each of the questions 31 to 36 consists of an assertion (statement) on the left-hand side and a reason on the right-hand side
Select:

A. if both the assertion and the reason are true statements and the reason is a correct explanation of the assertion.
B. if both the assertion and the reason are true statements but the reason is not a correct explanation of the assertion.
C. if the assertion is true but the reason is not a correct statement.
D. if the assertion is not correct but the reason is a correct statement.

41. When pure copper is heated in air, its mass increases because the metal is
high in the activity series
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Concentrated sulphuric acid is used as a drying agent because sulphuric acid has a high affinity for water.
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Potassium with atomic number 19 belongs to Group I in the Periodic Table
because potassium gains one electron to form potassium ion.
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Ethene can form a polymer because it is hydrocarbon.
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Electrolysis of dilute sulphuric acid between platinum electrodes produces oxygen at the anode because the hydroxide ions are preferentially discharged at the anode.
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MULTIPLE - COMPLETION QUESTIONS
In each of the questions 39 to 50, one or more of the answers given mat’ be correct. Read each question carefully and then indicate the correct answer according to the following:

A. If 1, 2 and 3 only are correct.
B. If 1 and 3 only are correct.
C. If 2 and 4 only are correct.
D. If 4 only is correct.

46. Which of the following statement is true about the kinetic theory of gases?
1. Gas molecules consist of tiny particles
2. gas particles collide with one another.
3. gas particles are in a state of continuous motion
4. there are large forces of attraction between gas particles.
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Which one(s) of the following oxides dissolves(s) in both aqueous sodium hydroxide and dilute nitric acid?
1. Magnesium oxide
2. aluminum oxide
3. copper (II) oxide
4. lead (II) oxide.
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Which pair (s) of the mixtures below can be separated by sublimation?
1. Sodium chloride and lead (II) chloride
2. copper (ll) chloride and zinc nitrate.
3. zinc sulphate and lead (II) nitrate,
4. ammonium chloride and zinc chloride
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The hydroxide(s) which / are soluble in excess ammonia solution is / are
1. lead (II) hydroxide
2. zinc hydroxide
3. aluminium hydroxide
4. copper(II) hydroxide
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The observation(s) made when a burning magnesium is plunged into a jar of carbon dioxide is / are
1. bright light
2. white ash
3. black solid
4. colourless gas.
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Chemistry Test Paper 15

KAWA Chemistry Quiz