Chemistry 0620/12 October/November 2024: question paper and mark scheme

Question

The table shows some information about the three states of matter. particle particle type of motion separation arrangement 1 touching with some particles random slide past each having spaces between them other at low speed 2 particles are far apart random rapid motion in straight lines 3 touching with very little regular vibration only space between the particles Which row is correct? 1 2 3 A gas liquid solid B liquid solid gas C liquid gas solid D solid gas liquid

Question

Which arrow represents evaporation? A B solid liquid gas C D

Question

In which states of matter does diffusion occur readily? A gases and liquids B gases only C liquids and solids D solids only

Question

Which statement about the boxes P, Q and R is correct? P Q R A Box P contains two compounds, and box R contains two elements. B Box P contains two elements, and box Q contains a mixture. C Box P contains two elements, and box Q contains one compound. D Box Q contains two compounds, and box R contains a mixture.

Question

Which information about an element is given by its atomic number? A the number of protons in the nucleus of an atom of an element B the number of particles in the nucleus of an atom of an element C the relative mass of one atom of an element D the total number of particles in one atom of an element

Question

The symbols represent four atoms. The letters used are not the usual atomic symbols. 40 40 46 46 20 W 19 X 20 Y 22 Z Which atoms are isotopes of the same element? A W and X B W and Y C X and Y D Y and Z

Question

Covalent bonds are formed when electrons are ……1…… . Most covalent compounds have ……2…… electrical conductivity. Which words correctly complete gaps 1 and 2? 1 2 A shared high B shared low C transferred high D transferred low

Question

Which row describes the structure and a use of diamond? structure use A ionic in cutting tools B ionic as a lubricant C giant covalent in cutting tools D giant covalent as a lubricant

Question

Which symbol equation represents the reaction between aqueous sodium hydroxide and dilute sulfuric acid? A Na2OH + H2SO4 → 2NaSO4 + H2O B Na(OH)2 + H2SO4 → Na2SO4 + 2H2O C 2NaOH + H2SO4 → 2NaSO4 + 2H2O D 2NaOH + H2SO4 → Na2SO4 + 2H2O

Question

What is the relative formula mass of magnesium bromide? A 47 B 82 C 104 D 184

Question

Three substances are listed. 1 solid copper 2 aqueous sodium bromide 3 solid lead(II) bromide Which substances conduct electricity? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only

Question

Hydrogen–oxygen fuel cells can be used to power cars. Which processes produce the fuel of a hydrogen–oxygen fuel cell? 1 the cracking of hydrocarbons 2 the electrolysis of dilute sulfuric acid 3 photosynthesis 4 the electrolysis of molten aluminium oxide A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Question

Molten sodium sulfide, Na2S, is electrolysed using inert electrodes. Which row identifies the product at each electrode? cathode anode A sodium sulfur B sulfur sodium C hydrogen sulfur D sodium hydrogen

Question

The temperature of the water in two beakers, X and Y, is measured as 21.5 °C. 5 g of sodium chloride is dissolved in the water in beaker X. The temperature changes to 18.0 °C. 5 g of calcium oxide is dissolved in the water in beaker Y. The temperature changes to 29.4 °C. Which types of process are occurring in beakers X and Y? X Y A endothermic endothermic B endothermic exothermic C exothermic endothermic D exothermic exothermic

Question

Which process involves a chemical change? A adding sodium chloride to water B adding magnesium to hydrochloric acid C heating solid iodine until it turns into a gas D melting lead

Question

Which two pieces of apparatus are most useful to measure the rate of a reaction in which a gas is given off? A accurate balance and gas syringe B accurate balance and thermometer C gas syringe and stop-watch D stop-watch and thermometer

Question

Reaction 1 and reaction 2 both produce a gas. The total volume of gas produced in each reaction is measured every minute for 10 minutes. A graph of the results is shown. 100 90 2 80 70 60 total volume 50 of gas / cm3 1 40 30 20 10 0 0 1 2 3 4 5 6 7 8 9 10 time / min Which row describes how the rate of reaction changes, if at all, during each reaction? reaction 1 reaction 2 A the rate is constant the rate decreases after 2 minutes B the rate increases the rate increases C the rate increases the rate decreases after 2 minutes D the rate is constant the rate increases

Question

When a few drops of water are added to a solid, E, the colour changes from blue to pink. What is E? A anhydrous cobalt(II) chloride B anhydrous copper(II) sulfate C hydrated cobalt(II) chloride D hydrated copper(II) sulfate

Question

The equation for the reaction of magnesium with copper(II) oxide is shown. Mg + CuO → MgO + Cu Which word describes this reaction? A combustion B decomposition C neutralisation D redox

Question

Compound M contains calcium. Two reactions of M are listed. ● M reacts with dilute hydrochloric acid to form a salt and water only. ● M reacts with aqueous ammonium chloride to form a gas that turns damp red litmus paper blue. What is M? A CaOH B Ca(OH)2 C CaCO3 D Ca(CO3)2

Question

The diagram shows one period of the Periodic Table. Li Be B C N O F Ne Which two elements form acidic oxides? A beryllium and lithium B carbon and neon C carbon and nitrogen D nitrogen and neon

Question

A student tests four solutions with universal indicator. Which colour identifies the solution containing the greatest concentration of OH– ions? A red B yellow C green D blue

Question

The following steps are done to prepare solid magnesium sulfate. 1 filtration 2 measurement of 20 cm3 of dilute sulfuric acid using a measuring cylinder 3 evaporation 4 addition of an excess of solid magnesium carbonate to dilute sulfuric acid What is the correct order for these steps? A 2→4→3→1 B 2→4→1→3 C 4→2→1→3 D 4→2→3→1

Question

Which statement about the Periodic Table is correct? A All the metals in the Periodic Table are transition elements. B The halogens are elements in Group I of the Periodic Table. C The elements become more metallic across a period from Group I to Group VII. D The Periodic Table can be used to predict the properties of the elements.

Question

Zinc is formed when zinc oxide is heated with carbon. zinc oxide + carbon → zinc + carbon monoxide Which substance is oxidised in this reaction? A carbon B carbon monoxide C zinc D zinc oxide

Question

Which word equation represents the rusting of iron? A iron + oxygen + water → anhydrous iron(II) hydroxide B iron + oxygen → hydrated iron(II) oxide C iron + oxygen + water → anhydrous iron(III) hydroxide D iron + oxygen + water → hydrated iron(III) oxide

Question

Which option describes the electronic configurations of three different elements from the same group of the Periodic Table? A 2 2,2 2,8,8,2 B 2 2,8 2,8,2 C 2,1 2,8,1 2,8,8,1 D 2,1 2,2 2,3

Question

Which metal forms compounds that can be used to colour glass? A aluminium B calcium C chromium D sodium

Question

Two properties of element R are listed. ● It is a dark solid at room temperature. ● It is a diatomic molecule. Where on the Periodic Table is R placed? A Group I B Group VII C Group VIII D transition elements

Question

Four metals, W, X, Y and Z, are tested with either cold water, steam or both. The observations are shown. metal observations W reacts slowly with cold water X reacts rapidly with cold water Y does not react with cold water but reacts with steam Z does not react with cold water or steam What is the order of reactivity of the metals from the least reactive to the most reactive? least most reactive reactive A W X Y Z B W Y X Z C Z Y X W D Z Y W X

Question

Which statement about the displacement reactions of the halogens is correct? A Iodine displaces bromine from aqueous sodium bromide. B Bromine displaces chlorine from aqueous potassium chloride. C Iodine displaces chlorine from aqueous potassium chloride. D Chlorine displaces bromine from aqueous sodium bromide.

Question

Which substances in water from natural sources are beneficial to aquatic animals? 1 metal compounds 2 plastics 3 phosphates 4 dissolved oxygen A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

Question

What are the products formed when glucose is fermented? A ethanol and carbon dioxide B ethanol and oxygen C ethene and carbon dioxide D ethene and oxygen

Question

Which structure represents a molecule of ethanol? A B C D H H H H H H H O H C C H C C H C C O H H C C H H H H H H H O H

Question

Which statement describes a homologous series? A a family of elements in the same group of the Periodic Table B a family of elements with similar chemical properties C a family of compounds with the same functional group D a family of compounds with similar physical properties

Question

What are the properties of aqueous ethanoic acid? reacts with decolourises turns damp red calcium carbonate to aqueous bromine litmus paper blue make carbon dioxide A B C D

Question

Four different organic compounds are separated by a fractionating column. The table shows the boiling points of the compounds. The diagram shows the position in the fractionating column where they are separated. compound boiling point / °C Q 69 R 196 S 90 T 125 fraction 1 fraction 2 fraction 3 fraction 4 mixture of organic compounds Which row identifies the compound in each fraction? fraction 1 fraction 2 fraction 3 fraction 4 A Q S T R B Q T S R C R T S Q D R S T Q

Question

Which piece of apparatus is used to measure exactly 21.50 cm3 of dilute sulfuric acid? A beaker B burette C measuring cylinder D volumetric pipette

Question

Which row shows an advantage and a disadvantage for the stated apparatus used in a titration? apparatus advantage disadvantage A 25 cm3 measures can only be used to volumetric pipette volume accurately measure 25 cm3 of solution B 50 cm3 burette measures can only be used to volume accurately measure 50 cm3 of solution C 100 cm3 beaker suitable for can only be used to filling burette fill a 100 cm3 burette D 250 cm3 conical flask allows solutions to be not suitable for holding mixed without spilling volumes less than 250 cm3

Question

Sample M contains calcium carbonate and sodium nitrate. The result of adding water to M, stirring and filtering is shown. No chemical reaction occurs. calcium carbonate aqueous sodium nitrate Which terms describe M, calcium carbonate and aqueous sodium nitrate? calcium aqueous sample M carbonate sodium nitrate A compound filtrate residue B compound residue filtrate C mixture filtrate residue D mixture residue filtrate 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 16 85 88 89 91 93 96 – 101 103 106 108 112 115 119 122 128 127 131 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 89–103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 actinoids Fr Ra Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og francium radium rutherfordium dubnium seaborgium bohrium hassium meitnerium darmstadtium roentgenium copernicium nihonium flerovium moscovium livermorium tennessine oganesson – – – – – – – – – – – – – – – – – 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.).