Danho
ZIMSEC O Level · 5071/2 · N2016

Chemistry Paper 2 November 2016

Questions
27
Total marks
85
Time allowed
120 min
Syllabus code
5071/2

Sit this paper online

Questions
27
Pass mark
17
Sit this paper

Answer every question in the printed order, get marked at the end, then see the answers.

The questions

Question 101

[1 marks]Periodic table position from electronic configuration; ionic bonding with fluorine
An element X has the electron configuration 2, 8, 3. In which period of the periodic table is X located?
  1. AGroup 3
  2. BPeriod 3
  3. CPeriod 2
  4. DPeriod 4

Question 102

[1 marks]Periodic table position from electronic configuration; ionic bonding with fluorine
An element X has the electron configuration 2, 8, 3. State, in one word, whether X is a metal or a non-metal.

Answer this when you sit the paper.

Question 103

[1 marks]Periodic table position from electronic configuration; ionic bonding with fluorine
An element X (electron configuration 2, 8, 3) reacts with fluorine to form an ionic compound W. Why does W not conduct electricity in the solid state?
  1. AIts ions are held in fixed positions and are not free to move.
  2. BIt is covalently bonded, so it contains no charged particles.
  3. CIts ions carry no electrical charge.
  4. DIt has delocalised electrons that repel each other and block current flow.

Question 201

[1 marks]Methods of separating mixtures
A mixture of petrol, diesel and paraffin needs to be separated into its components. Which method of separation should be used?
  1. APaper chromatography
  2. BSimple distillation
  3. CFiltration
  4. DFractional distillation

Question 202

[1 marks]Methods of separating mixtures
A mixture of the amino acids lysine, glycine and glutamic acid needs to be separated so that each component can be identified. Which method of separation should be used?
  1. ACrystallisation
  2. BPaper chromatography
  3. CFractional distillation
  4. DFiltration

Question 203

[1 marks]Methods of separating mixtures
A solid mixture of ammonium chloride and sodium chloride needs to be separated. Which method of separation should be used?
  1. AFiltration
  2. BSimple distillation
  3. CFractional distillation
  4. DSublimation

Question 301

[1 marks]Identifying species by description; bonding and uses of chlorine, copper, silicon
Which of the following substances turns damp red litmus paper blue: silicon dioxide (SiO2), carbon dioxide (CO2), sulphur dioxide (SO2), or ammonia (NH3)?
  1. ASulphur dioxide (SO2)
  2. BSilicon dioxide (SiO2)
  3. CAmmonia (NH3)
  4. DCarbon dioxide (CO2)

Question 302

[1 marks]Identifying species by description; bonding and uses of chlorine, copper, silicon
Which of the following substances is responsible for producing acid rain: carbon dioxide (CO2), the manganate(VII) ion (MnO4-), sulphur dioxide (SO2), or ammonia (NH3)?
  1. AAmmonia (NH3)
  2. BCarbon dioxide (CO2)
  3. CThe manganate(VII) ion (MnO4-)
  4. DSulphur dioxide (SO2)

Question 303

[1 marks]Identifying species by description; bonding and uses of chlorine, copper, silicon
Which of the following species is an oxidising agent: silicon dioxide (SiO2), carbon dioxide (CO2), sulphur dioxide (SO2), or the manganate(VII) ion (MnO4-)?
  1. AThe manganate(VII) ion (MnO4-)
  2. BSilicon dioxide (SiO2)
  3. CCarbon dioxide (CO2)
  4. DSulphur dioxide (SO2)

Question 401

[1 marks]Dynamic equilibrium; precipitation of barium sulphate
Which of the following is the correct definition of dynamic equilibrium in a reversible reaction?
  1. AA state in which only the forward reaction continues to occur.
  2. BA state in which the rate of the forward reaction equals the rate of the backward reaction.
  3. CA state in which all the reactants have been converted into products.
  4. DA state in which the reaction has completely stopped.

Question 402

[1 marks]Dynamic equilibrium; precipitation of barium sulphate
For the equilibrium N2(g) + O2(g) ⇌ 2NO(g), ΔH° = +360 kJ/mol (the forward reaction is endothermic), what is the effect of cooling the reaction mixture on the position of equilibrium?
  1. AThe reaction stops completely.
  2. BThe equilibrium shifts to favour the forward (endothermic) reaction.
  3. CThe equilibrium shifts to favour the backward (exothermic) reaction.
  4. DThe equilibrium position is unaffected by temperature.

Question 403

[1 marks]Dynamic equilibrium; precipitation of barium sulphate
Which pair of substances reacts together to produce a precipitate of barium sulphate, an insoluble salt?
  1. ASodium chloride solution and dilute sulphuric acid
  2. BBarium chloride solution and dilute hydrochloric acid
  3. CBarium chloride solution and dilute sulphuric acid
  4. DCalcium chloride solution and dilute sulphuric acid

Question 501

[1 marks]Unsaturated hydrocarbons; distinguishing tests; alcohols and carboxylic acids
Which of the following is the correct definition of an unsaturated hydrocarbon?
  1. AA hydrocarbon in which every carbon atom is bonded to four other atoms by single bonds only.
  2. BA hydrocarbon that contains only carbon and no hydrogen atoms.
  3. CA hydrocarbon that does not react with bromine water.
  4. DA hydrocarbon containing a double (or triple) bond between carbon atoms, so not all carbon atoms are bonded to the maximum of four other atoms.

Question 502

[1 marks]Unsaturated hydrocarbons; distinguishing tests; alcohols and carboxylic acids
Bromine water is added separately to samples of CH3CH3 (ethane) and CH2=CH2 (ethene). What is observed?
  1. ANeither sample causes any colour change in the bromine water.
  2. BThe bromine water is decolourised by CH2=CH2 but remains reddish-brown with CH3CH3.
  3. CThe bromine water is decolourised by CH3CH3 but remains reddish-brown with CH2=CH2.
  4. DBoth samples decolourise the bromine water at the same rate.

Question 503

[1 marks]Unsaturated hydrocarbons; distinguishing tests; alcohols and carboxylic acids
What is the functional group present in ethanoic acid, CH3COOH?

Answer this when you sit the paper.

Question 601

[1 marks]Reaction of sodium sulphite with hydrochloric acid; mole/volume calculations
Sodium sulphite, Na2SO3, reacts with hydrochloric acid to produce sodium chloride, sulphur dioxide and water: Na2SO3 + 2HCl -> 2NaCl + SO2 + H2O. Write the ionic equation for this reaction.

Answer this when you sit the paper.

Question 602

[1 marks]Reaction of sodium sulphite with hydrochloric acid; mole/volume calculations
Sodium sulphite, Na2SO3, reacts with hydrochloric acid to produce sodium chloride, sulphur dioxide gas and water. Which test confirms that the gas evolved is sulphur dioxide?
  1. AAcidified potassium dichromate(VI) paper turns from orange to green in the gas.
  2. BA glowing splint relights when placed in the gas.
  3. CLimewater turns milky when the gas is bubbled through it.
  4. DDamp red litmus paper turns blue in the gas.

Question 603

[1 marks]Reaction of sodium sulphite with hydrochloric acid; mole/volume calculations
12.6 g of sodium sulphite, Na2SO3 (Mr = 126), reacts completely with 20 cm3 of hydrochloric acid according to Na2SO3 + 2HCl -> 2NaCl + SO2 + H2O. What is the concentration of the hydrochloric acid, in mol/dm3?
  1. A10 mol/dm3
  2. B20 mol/dm3
  3. C5 mol/dm3
  4. D0.01 mol/dm3

Question 701

[1 marks]Empirical/molecular formula of a hydrocarbon; addition polymerisation
A hydrocarbon X consists of 85.7% carbon and 14.3% hydrogen by mass. What is its empirical formula?

Answer this when you sit the paper.

Question 702

[1 marks]Empirical/molecular formula of a hydrocarbon; addition polymerisation
A hydrocarbon X has empirical formula CH2 and a relative molecular mass of 42. What is its molecular formula?
  1. AC3H6
  2. BC2H4
  3. CC4H8
  4. DC3H8

Question 703

[1 marks]Empirical/molecular formula of a hydrocarbon; addition polymerisation
A hydrocarbon X has the molecular formula C3H6. Which homologous series does X belong to?
  1. AAlcohols
  2. BAlkenes
  3. CAlkanes
  4. DAlkynes

Question 801

[1 marks]Reactions of Zn2+/Fe2+ ions with sodium hydroxide; reactivity and gas tests
Aqueous sodium hydroxide is added to a solution containing Zn2+ ions, forming a white precipitate. What is the chemical formula of this white precipitate?

Answer this when you sit the paper.

Question 802

[1 marks]Reactions of Zn2+/Fe2+ ions with sodium hydroxide; reactivity and gas tests
Aqueous sodium hydroxide is added to a solution containing Fe2+ ions, forming a green precipitate. What is the chemical formula of this green precipitate?

Answer this when you sit the paper.

Question 803

[1 marks]Reactions of Zn2+/Fe2+ ions with sodium hydroxide; reactivity and gas tests
A green precipitate of iron(II) hydroxide, Fe(OH)2, formed by adding aqueous sodium hydroxide to a solution of Fe2+ ions, is left exposed to air. What happens to it?
  1. AIt remains unchanged, staying green indefinitely.
  2. BIt is reduced, turning into a grey metallic solid as Fe2+ is converted to Fe metal.
  3. CIt is oxidised, turning into a reddish-brown precipitate as Fe2+ is converted to Fe3+.
  4. DIt dissolves completely, forming a colourless solution.

Question 901

[1 marks]Halogens: physical states, sources and uses; allotropes of carbon
Chlorine, bromine and iodine are Group VII elements. What is the physical state of bromine at room temperature?
  1. AGas
  2. BSolid
  3. CLiquid
  4. DPlasma

Question 902

[1 marks]Halogens: physical states, sources and uses; allotropes of carbon
State one industrial source of chlorine gas.

Answer this when you sit the paper.

Question 903

[1 marks]Halogens: physical states, sources and uses; allotropes of carbon
Diamond, an allotrope of carbon, is used in jewellery. Which property of diamond makes it suitable for this use?
  1. AIt is a good conductor of electricity.
  2. BIt is soft and can be easily shaped into different forms.
  3. CIt has a low melting point and can be moulded when heated.
  4. DIt is very hard and has high brilliance, reflecting light strongly.

More sittings of this paper

The answers, and why they are the answers

Sit the paper here to see which ones you got right. Danho explains every question, keeps your score, and works without a connection.

Get it on Google PlayDownload on the App Store