Chemistry Test Paper 16

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Which one of the following formulae represents an alkane?
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Which one of the following compounds is formed when excess Sulphur dioxide is passed through sodium hydroxide solution?
A. Sodium sulphate
B. Sodium hydrogen sulphite
C. Sodium sulphite
D. Sodium hydrogen sulphate.
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Which one of the following substances is formed when magnesium burns in carbon dioxide?
A. Magnesium carbonate
B. Magnesium nitride
C. Carbon monoxide
D. Carbon
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Calcium carbonate reacts with hydrochloric acid according to the following equation:
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Which one of the following substances will dissolve in water to give a solution that would turn red litmus paper blue?
A. Sodium chloride
B. Sodium hydroxide
C. Sodium sulphate
D. Sodium nitrate.
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Which one of the following oxides will form a metal when healed with aluminium?
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The rate of decomposition of hydrogen peroxide would be increased by the addition of
A. Copper (II) sulphate
B Manganese (IV) oxide
C. Vanadium (V) oxide
D. finely divided iron.
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Which one of the following liquids is miscible with water?
A. Ethanol
B. Methyl benzene
C. Kerosene
D. Petrol.
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The substance that will undergo a permanent change when heated strongly is
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The substance that is produced at the anode when a concentrated solution of potassium iodide is electrolysed is
A. potassium
B. hydrogen
C. oxygen
D. iodine
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Butane bums in excess air according to the following equation:
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Lead (II) nitrate reacts with potassium iodide according to the following equation:

The mass of lead(II) iodide formed when 33.2g of potassium iodide is heated in excess lead (II) nitrate is
1. 16.9g
2. 46.1g
3. 66-4 g
4. 92.2g
Which of the following nitrates will produce nitrogen dioxide when strongly heated?
A. Potassium nitrate
B. Sodium nitrate
C. Zinc nitrate
D. Ammonium nitrate.
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Which of the following salts cannot be prepared by precipitation method?
A. Lead (lI) nitrate
B. Lead (II) chloride
C. Lead (II) sulphate
D. Lead (II) carbonate.
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Which one of the following reagents can be used to distinguish between?
A. Lead (II) nitrate
B. Sodium hydroxide
C. Potassium iodide
D. Ammonia.
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The substance which is most suitable for drying ammonia is
1. Concentrated sulphuric acid
2. Calcium chloride
3. Phosphorus (V) oxide
4. Calcium oxide.
The reaction between ethanol and concentrated sulphuric acid to form ethene is called
1. hydrogenation,
2. Catalysis
3. dehydration
4. hydration
Calcium hydrogen carbonate when heated decomposes according to the equation:
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Which one of the following salts can be prepared by precipitation method?
A. Zinc nitrate
B. Copper (II) sulphate
C. Barium sulphate
D. Iron (III) chloride.
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Copper reacts with oxygen according to the equation below:
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Which one of the following metals can displace hydrogen from dilute hydrochloric acid?
1. Copper
2. Magnesium
3. Lead
4. Silver.
The following acids are completely ionized in water except
1. hydrochloric acid
2. nitric acid
3. sulphuric acid
4. carbonic acid.
Which one of the following statements is false about catalyst? They
1. increase the amount of products in chemical reactions.
2. remain chemically the same me end of chemical reactions.
3. increase the rates of chemical reactions.
4. affect the rates of reactions even in very small amounts.
The gas that turns brown when exposed in air from the following list is
1. Sulphur dioxide
2. hydrogen chloride
3. hydrogen sulphide
4. nitrogen monoxide.
The concentration, in grammes per litre, of a 0.05M sodium carbonate solution is
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Which one of the following equations represents an oxidation reduction reaction?
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Which one of the following is an acid salt?
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The hydroxide that dissolves in excess aqueous ammonia but does not in sodium hydroxide solution is
1. lead (II) hydroxide
2. zinc hydroxide
3. aluminium hydroxide
4. copper (II) hydroxide.
The oxide that dissolves most readily in water is
1. sodium oxide
2. calcium oxide
3. lead (II) oxide
4. copper(II) oxide
The catalyst used during the manufacture of nitric acid by oxidation of ammonia is
1. Platinum
2. iron
3. nickel
4. copper
Copper (II) oxide reacts with hydrogen according to the equation:
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Which of the following pairs of metals is used to make solder?
1. Zinc and lead
2. Copper and aluminium
3. Tin and lead
4. Copper and zinc.
The substance that decomposes when heated strongly is
1. potassium carbonate
2. potassium hydroxide
3. potassium chloride
4. potassium nitrate.
The cation that forms a green precipitate with sodium hydroxide is
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Methane burns in oxygen according to the equation:
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Which one of the following fertilizers has the highest nitrogen content per mole of the fertilizer?
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The hydroxide which turns brown when exposed to air from the list below is
1. copper (II) hydroxide
2. iron (II) hydroxide
3. lead (II) hydroxide
4. iron (III) hydroxide.
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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. Hydrogen chloride conducts electricity because hydrogen chloride is soluble in water.
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Ammonia reacts with copper oxide to form nitrogen because copper (II) oxide is oxidized by (II) ammonia.
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During the manufacture of sulphuric acid, sulphur dioxide is converted to sulphur trioxide in the presence of vanadium (V) oxide because vanadium (V) oxide increases the rate of formation of sulphur trioxide
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Sulphur dioxide turns acidified Potassium dichromate green because it is a reducing agent.
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Pollen grains in water are in continuous motion because pollen grains collide with moving water molecules.
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MULTIPLE COMPLETION QUESTIONS
In each of the questions 46 to 50, one or more of the answers given may 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. A metal forms a hydroxide which is soluble in water. The metal will form a chloride that
1. is soluble in water
2. has a high melting point
3. conducts electricity when molten
4. is soluble in methylbenzene
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Which of the following substance(s) is / are commonly used to convert brown sugar to white sugar?
1. Sulphur dioxide
2. Bleaching powder
3. Animal charcoal
4. Sodium hypochlorite.
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Which of the following is / are observed when a mixture of copper (II) oxide and charcoal is heated?
1. Lime water remained colourless
2. lime water turned milky.
3. black residue
4. reddish - brown residue.
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Which of the following when electrolyzed between platinum electrodes will produce water and hydrogen?
1. Sodium chloride solution
2. Copper (II) chloride solution
3. Copper (II) sulphate solution.
4. Acidified water
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Which of the following nitrates will decompose on heating to form a nitrite?
1. calcium nitrate
2. potassium nitrate
3. magnesium nitrate
4. sodium nitrate.
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Chemistry Test Paper 16

Multiple Choice Questions