Chemistry 0620/11 October/November 2022: question paper and mark scheme

Question

Which row describes the spacing and arrangement of particles in a solid, a liquid and a gas? solid liquid gas A close together and close together and far apart and randomly arranged regularly arranged randomly arranged B close together and far apart and close together and randomly arranged randomly arranged randomly arranged C close together and close together and far apart and regularly arranged randomly arranged randomly arranged D close together and close together and close together and regularly arranged regularly arranged randomly arranged

Question

Which piece of apparatus is used to measure exactly 25.0 cm3 of hydrochloric acid? A beaker B burette C conical flask D test-tube

Question

A mixture contains salt, sand and sulfur. Salt dissolves in water but not in xylene. Sulfur dissolves in xylene but not in water. Sand does not dissolve in water or xylene. What is the order of the processes used to separate the salt, the sand and the sulfur from the mixture? A add water → filter → add xylene to the filtrate → filter B add water → filter → add xylene to the residue → filter C add xylene → filter → add water to the filtrate → filter D add xylene → filter → add xylene to the residue → filter

Question

The structure of an atom is shown. key 9p = electron 10n n = neutron p = proton Which row shows the nucleon number and proton number of this atom? nucleon proton number number A 9 10 B 19 10 C 10 9 D 19 9

Question

Which statement about an alloy is correct? A It is a compound made of two or more elements, one of which is a metal. B It is a layer of a metal plated onto another metal. C It is a mixture of a metal with one or more other elements. D It is a single element.

Question

Which statements about potassium bromide are correct? 1 It has a high melting point. 2 It dissolves in water. 3 It conducts electricity when solid. A 1 and 2 B 1 and 3 C 2 and 3 D 3 only

Question

Which row describes the bonding in graphite and a use of graphite? bonding in graphite a use of graphite A each atom is bonded in cutting tools covalently to three other atoms B each atom is bonded as an electrical conductor covalently to three other atoms C each atom is bonded in cutting tools covalently to four other atoms D each atom is bonded as an electrical conductor covalently to four other atoms

Question

Caffeine is a stimulant found in coffee. O CH3 H 3C C N N C C H C C N O N CH3 caffeine Which formula represents caffeine? A C7H10N4O2 B C8H10N3O2 C C8H10N4O2 D C8H11N4O2

Question

The fuel ethane, C2H6, burns in air to form carbon dioxide and water. 2C2H6 + 7O2 → 4CO2 + 6H2O Which statement about burning ethane is correct? A When one molecule of ethane burns, one molecule of water is formed. B The number of atoms at the end of the reaction is the same as at the start. C During the reaction there is a decrease in the number of molecules. D The reaction is endothermic.

Question

Which statement about the electrolysis of concentrated aqueous sodium chloride is correct? A Chlorine is produced at the positive electrode. B Hydrogen is produced at the positive electrode. C Oxygen is produced at the negative electrode. D Sodium is produced at the negative electrode.

Question

When an acid is added to an alkali, the temperature of the reaction mixture rises. Which words describe this reaction? A decomposition and endothermic B decomposition and exothermic C neutralisation and endothermic D neutralisation and exothermic

Question

Some properties of four fuels are shown. Which fuel is a gas at room temperature and makes two products when it burns in a plentiful supply of air? melting point boiling point fuel formula / °C / °C A hydrogen H2 –259 –253 B methane CH4 –182 –164 C octane C8H18 –57 126 D wax C31H64 60 400

Question

Which process is a physical change? A burning wood B cooking an egg C melting an ice cube D rusting iron

Question

A student adds excess zinc to dilute hydrochloric acid at 25 °C. The hydrogen gas produced is collected and measured at room temperature and pressure. The results are plotted and labelled as curve X on the graph. The experiment is repeated at 50 °C with all other conditions remaining the same. Which graph shows the results at 50 °C? A B volume of X hydrogen gas C D 0 0 time

Question

Substance Y is a pink solid. When substance Y is heated gently it becomes a blue solid. When the blue solid is cooled down it remains blue. When water is added to the blue solid it becomes pink. What is substance Y? A anhydrous cobalt(II) chloride B anhydrous copper(II) sulfate C hydrated cobalt(II) chloride D hydrated copper(II) sulfate

Question

When magnesium is heated with zinc oxide a reaction occurs. The equation is shown. Mg + ZnO → MgO + Zn Which substance is oxidised? A magnesium B magnesium oxide C zinc D zinc oxide

Question

The diagram shows an experiment. aqueous P tap solid Q A small volume of aqueous P is poured on to solid Q and the tap of the funnel closed. Which pairs of substances cause the syringe to fill with gas? HNO3 HCl H2SO4 and and and Mg Cu Na2CO3 A B C D

Question

Part of the Periodic Table is shown. 1 3 4 2 Which elements form basic oxides? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4

Question

Aqueous ammonium sulfate is made by reacting aqueous ammonia with dilute sulfuric acid. How is solid ammonium sulfate obtained from the resulting solution? A crystallisation B distillation C filtration D solvent extraction

Question

Which statement about the Periodic Table is correct? A Elements in the same group have the same number of electron shells. B Elements are arranged in order of increasing proton number. C Metals are on the right and non-metals are on the left. D The most reactive elements are at the bottom of every group.

Question

Part of the Periodic Table is shown. Which element conducts electricity? B C A D

Question

Some information about properties of Group I elements is shown. melting point density element / °C in g / cm3 lithium 181 0.53 sodium 98 0.97 potassium X rubidium Y Z What are the values for X, Y and Z? X Y Z A 63 252 0.26 B 63 39 0.26 C 39 63 1.53 D 63 39 1.53

Question

Gas G has 10 electrons. Gas H has eight more electrons than gas G. Both gases are monoatomic. Which statement about G and H is correct? A Both gases are in the same group of the Periodic Table. B Both gases are in the same period of the Periodic Table. C Both gases are very reactive. D Gas G has a higher atomic mass than gas H.

Question

Metal M is placed between zinc and iron in the reactivity series. Which row shows the reactions of M and its oxide? M can be extracted M reacts with dilute by heating its oxide hydrochloric acid with carbon A no no B no yes C yes no D yes yes

Question

Which statement about sodium is correct? A It is a reactive grey solid which does not conduct electricity. B It is a very reactive element that forms ions with a single negative charge. C It reacts slowly with water to form oxygen. D It reacts rapidly with water to form its hydroxide.

Question

Iron from a blast furnace can be converted to steel. Which statements about steel are correct? 1 Steel contains more carbon than the iron obtained from the blast furnace. 2 Steel is produced by blowing oxygen through the iron. 3 Calcium oxide is added to molten iron to remove basic oxides. A 1 and 2 B 1 and 3 C 2 and 3 D 2 only

Question

Which row links a property of aluminium to its stated use? property use A high strength food containers B resistance to corrosion food containers C high density manufacture of aircraft D good electrical conductivity manufacture of aircraft

Question

The diagram shows a stage in the purification of dirty water. dirty water sand pot with holes fine gravel in bottom coarse gravel Which process does this apparatus show? A chlorination B condensation C distillation D filtration

Question

Which substance in polluted air damages stonework and kills trees? A carbon dioxide B carbon monoxide C lead compounds D sulfur dioxide

Question

Which reaction produces ammonia gas? A warming ammonium chloride with dilute sodium hydroxide B warming ammonium nitrate with dilute sulfuric acid C warming ammonium phosphate with dilute sodium chloride D warming ammonium sulfate with dilute nitric acid

Question

Which reactions produce carbon dioxide? 1 addition of dilute nitric acid to copper(II) carbonate 2 heating zinc carbonate 3 combustion of methane A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 3 only

Question

Which element has an oxide that is used as a food preservative? A helium B hydrogen C iron D sulfur

Question

Which substance gives off carbon dioxide on heating? A lime B limestone C limewater D slaked lime

Question

Which formula represents ethanol? A CH3CH3 B CH2CH2 C CH3CH2OH D CH3COOH

Question

Fuel oil and naphtha are two fractions obtained from petroleum. What are the major uses of these fractions? fuel oil naphtha A jet fuel making chemicals B jet fuel making roads C ship fuel making chemicals D ship fuel making roads

Question

Which compound is a member of the alkene homologous series? A C2H6 B C4H10 C C6H12 D C8H18

Question

Which type of covalent bond is found in both a molecule of methane and a molecule of ethane? A a double bond between a carbon atom and a hydrogen atom B a double bond between two carbon atoms C a single bond between a carbon atom and a hydrogen atom D a single bond between two carbon atoms

Question

A large hydrocarbon undergoes cracking. A smaller hydrocarbon, X, and a gas are the only two products. Which row identifies hydrocarbon X and the gas? hydrocarbon X gas A saturated carbon dioxide B saturated hydrogen C unsaturated carbon dioxide D unsaturated hydrogen

Question

The structures of two hydrocarbons, M and N, are shown. M N H H H H H H H H C C C C H H C C C C H H H H H H H H Which statement is correct? A M is an alkane and decolourises aqueous bromine. B M is an alkene and decolourises aqueous bromine. C N is an alkane and decolourises aqueous bromine. D N is an alkene and decolourises aqueous bromine.

Question

Some information about four substances, P, Q, R and S, is listed. P is made by combining many small molecules together. Molecules of Q are the largest molecules found in petroleum. R is produced by cracking alkanes. S is nylon. Which substances are synthetic polymers? A P and Q B P and S C Q and R D R and S The Periodic Table of Elements Group I II III IV V VI VII VIII 1 2 H He hydrogen helium Key 1 4 3 4 atomic number 5 6 7 8 9 10 Li Be atomic symbol B C N O F Ne lithium beryllium name boron carbon nitrogen oxygen fluorine neon 7 9 relative atomic mass 11 12 14 16 19 20 11 12 13 14 15 16 17 18 Na Mg Al Si P S Cl Ar sodium magnesium aluminium silicon phosphorus sulfur chlorine argon 23 24 27 28 31 32 35.5 40 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr potassium calcium scandium titanium vanadium chromium manganese iron cobalt nickel copper zinc gallium germanium arsenic selenium bromine krypton 39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe rubidium strontium yttrium zirconium niobium molybdenum technetium ruthenium rhodium palladium silver cadmium indium tin antimony tellurium iodine xenon 85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131 16 55 56 57–71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 lanthanoids Cs Ba Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn caesium barium hafnium tantalum tungsten rhenium osmium iridium platinum gold mercury thallium lead bismuth polonium astatine radon 133 137 178 181 184 186 190 192 195 197 201 204 207 209 – – – 87 88 89–103 104 105 106 107 108 109 110 111 112 114 116 actinoids Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Fl Lv francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium flerovium livermorium – – – – – – – – – – – – – 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 lanthanoids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu lanthanum cerium praseodymium neodymium promethium samarium europium gadolinium terbium dysprosium holmium erbium thulium ytterbium lutetium 139 140 141 144 – 150 152 157 159 163 165 167 169 173 175 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 actinoids Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr actinium thorium protactinium uranium neptunium plutonium americium curium berkelium californium einsteinium fermium mendelevium nobelium lawrencium – 232 231 238 – – – – – – – – – – – The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.).