Chemistry Test Paper 17

Chlorine can be prepared in the laboratory by heating concentrated hydrochloric acid with
A. lead (ll) oxide
B. iron (II) oxide
C. copper (II) oxide
D. manganese (IV) oxide.
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The most efficient method of separating a mixture: of copper (II) sulphate and lead (II) sulphate is by
A. decantation
B. sublimation
C. filtration
D. crystallization
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Which one of the following salts can be prepared from its elements by direct synthesis?
A. Potassium sulphate
B. Copper (II) carbonate
C. Magnesium chloride
D. Lead (II) nitrate.
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The trend which is observed on moving from left to right across Period in the Periodic Table is that the
A. non-metallic character increases
B. metallic character increases
C. number of energy levels decreases
D. number of energy levels increases.
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Which one of the following gases will not reduce copper (II) oxide?
A. Ammonia
B. Carbon monoxide
C. Hydrogen
D. Chlorine
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Which one of the following graphs shows the variation of the volume of carbon dioxide evolved with time when calcium carbonate is reacted with dilute hydrochloric acid?
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The metal which can be extracted from its ore only by electrolysis is
A. zinc
B. copper
C. iron
D. magnesium
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Which one of the following hydroxides will react with both dilute hydrochloric acid and aqueous sodium hydroxide?
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Which one of the following methods is most suitable for preparing a pure dry sample of silver chloride?
A. Direct synthesis
B. Neutralisation
C. Precipitation
D. Reacting silver with acid.
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When heated strongly, lead (II) nitrate leaves a solid residue whose colour is
A. reddish-brown (hot), grey (cold)
B. yellow(hot), white (cold)
C. reddish-brown (hot), yellow (cold
D. reddish-brown (hot), white (cold).
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The atomic numbers of element X and Y arc 9 and II respectively. Which one of the following properties is shown by the compound formed when X combines with Y?
A. it is a non-conductor of electricity
B. it has a high melting point
C. it is insoluble in water
D. it is a gas at room temperature.
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Which one of the following gases does not react with water?
A. Carbon dioxide
B. Oxygen
C. Ammonia
D Hydrogen chloride.
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The gas that changes the colour of acidified potassium dichromate solution from orange to green is
A. ammonia
B. chlorine
C. carbon dioxide
D. Sulphur dioxide.
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Which one of the following solutions contain
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Which one of the following substances funny an oxide which when dissolved in water turns red litmus blue?
A. Carbon
B. Phosphorus
C. Sulphur
D. Sodium
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The process of making steel from iron is called
A. galvanization
B. metal plating
C. glazing
D. alloying.
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Which one of the following properties is not shown by carbon monoxide?
A. it pollutes the atmosphere
B. it is insoluble in water
C. it is a reducing agent
D. it is an acidic oxide.
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The substance that will not sublime when heated is
A. Sulphur
B. ammonium Chloride
C. Iron (lll) chloride
D. Iodine
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The cation which when reacted with aqueous sodium hydroxide will form a precipitate that is soluble in excess sodium hydroxide solution is
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200.0 cm3 of a 0.1 M sodium hydroxide solution was diluted with water to make two litres of solution. The concentration of the diluted solution is
A. 0.002 M
B. 0.050M
C. 0.020M
D. 0.010M
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A white solid, X, was kept in an open container. After some days, the solid became liquid. X is
A. calcium oxide
B. magnesium hydroxide
C. fused calcium chloride
D. sodium carbonate crystals.
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Which one of the following hydrocarbons does not belong to the same group?
A. Ethane
B. Ethene
C. Methane
D. Propane.
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Copper (II) sulphate reacts with iron according to the following equation:

The mass of a dry copper metal That can be obtained when excess iron filings is added to 250cm3 of a 0.5M copper(II) sulphate solution is
A. 0.125g
B. 7.000g
C. 8.000g
D. 16.000g
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Which one of the following processes increases the concentration of oxygen in the atmosphere?

A. Photosynthesis
B. Fermentation
C. Combustion
D. Decaying of organic matter.
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Which one of the following polymers can be remoulded?

A. Polyester
B. Nylon
C. Polycthene
D. Rubber.
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Which one of the following acids when treated with zinc will not produce hydrogen gas?

A. Dilute nitric acid
B. Dilute hydrochloric acid
C. Dilute sulphuric acid
D. Dilute phosphoric acid.
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The compound which does not form an electrolyte when dissolved in water is
A. Potassium chloride
B. hydrogen chloride
C. ethanol
D. ethanoic acid.
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The numbers of protons, neutrons and electrons in some particles are shown in the table below:

Which one of the following particles represents a cation?
A. T.
B. R
C. Q
D. P
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Which one of the following factors does not affect the selection of an ion that is discharged at the electrodes during electrolysis?
A. Reactivity of the metal
B. Nature of electrode
C. Surface area of electrode
D. Concentration of electrolyte.
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An oxide of metal, M, contains 86.6% M. The empirical formula of the oxide is [O= 16, M = 207]
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The substance which does not produce carbon dioxide when heated strongly is
A. calcium carbonate
B. sodium carbonate
C. potassium hydrogen carbonate
D. sodium hydrogen carbonate.
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Which one of the following substances is not used in the softening of water?
A. Chlorine
B. Permitit
C. Sodium carbonate
D. Calcium hydroxide
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Which one of the following is Not a property of ethene?
A- It turns potassium permanganate colourless
B. It is an unsaturated hydrocarbon
C. It decolourises bromine water.
D. 1t is a saturated hydrocarbon.
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Metal P displaces hydrogen from a dilute acid but metal Q docs not. Metal R displaces P from its chloride. The order of reactivity of the metals beginning with the most reactive is
A. P, Q, R
B. Q, P, R
C. R, Q, P
D. R, P, Q
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ASSERTION - REASON QUESTIONS
Each of the questions 41 to 46 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. Nitric acid can be produced by reacting any nitrate with sulphuric acid because sulphuric acid is a stronger acid than nitric acid,
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Excessive use of detergents in laundry could cause environmental concerns because all detergents are insoluble water
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The enthalpy of combustion of carbon butane is higher than that of ethane because butane contains more atoms than ethane.
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Sulphuric acid changes sugar from white to black because sulphuric acid is an oxidizing agent.
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Alkali metals are highly Electropositive because they have one electron in their outermost shell.
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MULTIPLE COMPLETION QUESTIONS
In each of the questions 46 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. Carbon is similar to sulphur in that both.

1. are non-metallic solids
2. exist in allotropic forms
3. form covalent compounds
4. form neutral oxides.
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Which of the following gases is / are used as coolant(s) in refrigerators?
1. Chlorine
2. Carbon dioxide
3. Sulphur dioxide
4. Ammonia.
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Which of the following properties of metals is / are a result of its / their having free delocalized electrons?
1. Electrical conduction
2. Ductility
3- Heat conduction
4. Malleability
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Nitrogen can react with hydrogen to produce ammonia according to the following equation:

The condition(s) that would favour the formation of ammonia is / are
1. low pressure
2. high pressure
3. high temperature
4. low temperature
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The electronic configurations of elements B, D; E and F are 2:4, 2:6, 2:8:3 and 2:8.7 respectively, which elements when reacted together will form covalent compound(s)?
1. B and D.
2. D and E
3. B and F
4. E and F
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Chemistry Test Paper 17

Multiple Choice Questions