Test Paper 3

The alloy solder consists of
1. zinc and lead
2. copper and lead
3. copper and aluminium
4. tin and lead.
Which one of the following compounds is usually used as a catalyst in the reaction between pure zinc and dilute sulphuric acid in the laboratory?
1. A
2. B
3. C
4. D
The percentage by mass of water of crystallization in CuSO4 - 5H2O is
1. A
2. B
3. C
4. D
Which one of the following metals will Not displace lead from its salt in solution?
1. Aluminum
2. Calcium
3. Silver
4. Zinc
The gas produced when steam is passed over heated iron fillings is
1. A
2. B
3. C
4. D
The electronic configuration of the atoms of elements X and Y are 2: 8: 3 and 2.6 respectively. The formula of the compound formed between X and Y is
1. A
2. B
3. C
4. D
When an electric current was successively passed through a solution of silver nitrate and a solution of a metal M, 4.32 g of silver and 2.24g of M were formed. The charge on the ion of M is ( Ag = 108, M = 112)
1. +1
2. +2
3. +3
4. +4
Which one of the following equations does Not represent oxidation of the first substance?
1. A
2. B
3. C
4. D
Which one of the following tons forms a green precipitate when reacted with sodium hydroxide solution?
1. A
2. B
3. C
4. D
Which one of the following pairs of substances is used for the laboratory preparation of chlorine?
1. Dilute hydrochloric acid and potassium manganate (VII)
2. Concentrated sulphuric acid and sodium chloride.
3. Dilute hydrochloric acid and sodium sulphite.
4. Concentrated hydrochloric acid and potassium manganate (VII)
The molarity of a solution containing 40g of sodium hydroxide in 500 cm3 of the solution is
1. 0.2M
2. 0.5M
3. 1 .0M
4. 2.0M
Which one of the following gases does Not react with water?
1. Ammonia
2. Chlorine
3. Carbon monoxide
4. Sulphur dioxide.
The anion which can be confirmed by the brown ring test is
1. A
2. B
3. C
4. D
Which one of the following chlorides can be prepared by precipitation?
1. A
2. B
3. C
4. D
Graphite bums in oxygen according to the equation:

When 48g of graphite is burnt in excess oxygen the heat produced is ....
(Remember: C = 12, O = 16, H = -390kJ)
1. -97.5kJ
2. -195kJ
3. -780kJ
4. -1560kJ
The pair of compounds that can be used in the laboratory to prepare sulphur dioxide is
1. carbon and dilute sulphuric acid
2. copper metal and dilute sulphuric acid
3. iron(Il) sulphide and dilute nitric acid
4. sodium sulphite and dilute nitric acid.
Calcium carbonate reacts with hydrochloric acid according to the equation:

Which one of the following pairs of substances will show the highest rate of production of carbon dioxide at room temperature?
1. 10 cm3 of 2M hydrochloric acid + 2g of lumps of calcium carbonate
2. 10 cm3 of 1M hydrochloric acid + 2g of lumps of calcium carbonate.
3. 10 cm3 of 2M hydrochloric acid + 2 g of powered calcium carbonate.
4. 10 cm3 of 1M hydrochloric acid + 2 g of powered calcium carbonate.
Which one of the following reagents can be used to confirm the presence of lead (II) ions in solution?
1. Aqueous ammonia
2. Aqueous potassium iodide
3. Sodium hydroxide solution
4. Barium nitrate solution.
The volume of a 0.25M hydrochloric acid required to exactly react with 20.0cm3 of a 0.1 M sodium carbonate solution is given by
1. A
2. B
3. C
4. D
The electronic configurations of the atoms of elements P, Q, R and S are:
P:2, 1: Q: 2:8,1: R: 2.8,2 and S: 2, 8,3. The elements which belong to the same group in the periodic table are
1. P and Q
2. P and R
3. Q and R
4. R and S
Sodium carbonate and sodium hydrogen carbonate can be separated by fractional crystallization because the two salts have different.
1. densities
2. solubilities
3. melting points
4. boiling points
A few drops of concentrated sulphuric acid were added to a compound P. On warming the mixture, a colourless gas which fumes with ammonia was given off P could be
1. Chloride
2. carbonate
3. nitrate
4. sulphite,
Which one of the following elements is Not a constituent of fertilizers?
1. Nitrogen
2. Calcium
3. Phosphorus
4. Iodide
When a dilute solution of sodium chloride is electrolysed using carbon electrodes, the substance formed at the anode is
1. chlorine
2. sodium
3. oxygen
4. hydrogen.
Ammonium chloride reacts with calcium hydroxide according to the equation:

Calculate the volume of ammonia at room temperature, produced when 2.14g of ammonium chloride is reacted with calcium hydroxide. (Molecular mass of ammonium chloride = 53.5)
1. 0.48dm3
2. 0.96 dm3
3. 1.92dm3
4. 4.80 dm3
Which one of the following oxides does Not read with dilute sodium hydroxide solution?
1. ZnO
2. PbO
3. Fe2O3
4. AI2O3
A compound with the structural formula is called
1. butane
2. propane
3. 2-methyI butane
4. 2-methyl propane.
Which one of the following oxides is Not an alkali?
1. Cu(OH)2
2. KOH
3. Ca(OH)2
4. NaOH
Rust is hydrated
1. iron oxide
2. iron(III) hydroxide
3. iron (Ill)oxide
4. iron(IIl) hydroxide.
Which one of the following compounds is used as a catalyst in the manufacture of sulphur trioxide from air and sulphur dioxide?
1. Alumina
2. Vanadium(V) oxide
3. Manganese (IV) oxide
4. Iron powder.
Carbon monoxide burns in oxygen according to the equation:

20cm3 of carbon monoxide was mixed with 20cm3 of oxygen and exploded. If all volumes were measured at the same temperature and pressure, what was the final gaseous volume?
1. 20
2. 30cm3
3. 40cm3
4. 50cm3
An oxide of a metal M contains 78% of M and 22% oxygen, the empirical formula of the oxide is
1. MO
2. MO2
3. M2O3
4. M3O
Nitric acid can be prepared in the laboratory by the reaction between
1. A. potassium nitrite and concentrated hydrochloric acid.
2. potassium nitrite and concentrated sulphuric acid.
3. potassium nitrate and concentrated hydrochloric acid.
4. potassium nitrate and concentrated sulphuric acid.
ASSERTION - REASON QUESTIONS

Carbonhydrates are hydrocarbons because carbonhydrates react with concentrated sulphuric acid to form carbon.
1. A
2. B
3. C
4. D
Hydrogen chloride can be used in the fountain experiment because hydrogen chloride is soluble in water.
1. A
2. B
3. C
4. D
Hard water requires a lot of soap to form a lather because some of the soap is initially used in removing calcium ions
1. A
2. B
3. C
4. D
Isotopes of an element show similar chemical reactions because isotopes of an element contain the same number of neutrons.
1. A
2. B
3. C
4. D
When chlorine is bubbled into potassium iodide solution, iodine is liberated. because iodine atom is larger than chlorine atom.
1. A
2. B
3. C
4. D
The pH of an aqueous solution of carbon dioxide is greater than 7 because carbon dioxide reacts with water to form carbonic acid.
1. A
2. B
3. C
4. D
MULTIPLE COMPLETION QUESTIONS
When iron fillings is added to copper (II) sulphate solution
1. a brown solid is formed
2. bubbles of gas are formed
3. heat is produced
4. the solution becomes colourless.
1. A
2. B
3. C
4. D
The carbon atoms in graphite
1. form a layer structure
2. are held together by double bonds
3. are linked through single covalent bonds
4. form a three dimensional network.
1. A
2. B
3. C
4. D
Which of the following solids would Not show any change in mass when heated strongly in air?
1. wax
2. copper
3. sodium hydroxide
4. potassium manganate(VII).
1. A
2. B
3. C
4. D
A solution of potassium hydroxide was added to a solution of copper (ll) sulphate and the mixture heated strongly. The final product(s) formed was / were
1. A
2. B
3. C
4. D
Which of the following pairs of reactants would be suitable for preparing magnesium sulphate?
1. A
2. B
3. C
4. D
Covalent compounds
1 .are usually solids at room temperature?
2. are formed by sharing of electrons
3. conduct electricity when molten. ,
4. generally have low melting points.
1. A
2. B
3. C
4. D
Which of the following ions will form a white precipitate with barium chloride solution?
1. A
2. B
3. C
4. D
An element, T, belongs to group 11 in the Periodic Table, but below calcium. The element is likely to
1. be a solid a room temperature
2. form an ionic chloride of formula TCh
3. react with cold water and liberate hydrogen
4. form an oxide which reacts with both acids and alkalis.
1. A
2. B
3. C
4. D
Which of the following is / are formed when sodium hydrogen carbonate is strongly heated?
1. Sodium metal
2. Carbon dioxide
3. Sodium oxide
4. Sodium carbonate.
1. A
2. B
3. C
4. D
Air was passed through an apparatus as shown in the diagram above. The gas that comes out at Q consists of -
1. neon
2. oxygen
3. nitrogen
4. carbondioxide
1. A
2. B
3. C
4. D
Which of the following sulphate when heated strongly give(s) off a gas that turns potassium dichromate (VI) solution green?
1. A
2. B
3. C
4. D

Test Paper 3

Certificate Chemistry Test Papers