CAIE Chemistry (9701)

onlyD1 onlyC2 and 3B1 and 2A TheactivationenergyforreactionXislessthanthatofreactionY. moleculesofNOCl. ThediagramshowstheBoltzmanndistributionofenergiesinagas.Thegascantakepartina reactionwithanactivationenergy,E .Thegasismaintainedataconstanttemperature. proportion of molecules with a given energy molecular energy Which statement is correct? If a catalyst is added, peak P will be lower andE will move to the left.A If a catalyst is added, peak P will be lower andE will move to the right.B If a catalyst is added, peak P will be the same andE will move to the left.C If a catalyst is added, peak P will be the same andE will move to the right.D L, M and N are three different elements from Period 3 of the Periodic Table. L is the element whose atoms have three unpaired electrons in its 3p sub-shell. M is the element with the highest electrical conductivity in the period. N is the element with the highest melting point in the period. Which statement about element L is correct? L has a higher atomic number than M and a lower atomic number than N.A L has a lower atomic number than M and a higher atomic number than N.B L has a lower atomic number than both M and N.C L has a higher atomic number than both M and N.D In reactions 1 and 2, X represents an element in Period 3. In each reaction, X is forming a product where X is in its highest oxidation state. Which ratios show a steady increase from sodium to phosphorus? neither z : y nor q : pA z : y onlyB q : p onlyC both z : y and q : pD Sodium, magnesium, aluminium, silicon and phosphorus are all elements in Period 3 of the Periodic Table. Three statements about the oxides and chlorides of these elements are given. The ionically bonded oxides all react with dilute hydrochloric acid.1 All metal chlorides produce neutral solutions when added to water.2 The two most electronegative elements both form covalently bonded chlorides.3 Which statements are correct? 2 and 3 onlyD1 and 3 onlyC1 and 2 onlyB1, 2 and 3A The table compares calcium with barium and calcium carbonate with barium carbonate. Which row is correct? thermal stability of the metal carbonate reactivity of the element with water barium carbonate is more stablebarium is more reactiveA calcium carbonate is more stablebarium is more reactiveB barium carbonate is more stablecalcium is more reactiveC calcium carbonate is more stablecalcium is more reactiveD SolutionsPandQeachcontainadifferentGroup2ionatthesameconcentration.Onecontains .Testsarecarriedoutonseparate5cm samplesofPandQ. test1:add1cm of0.1moldm

test2:add1cm of0.1moldm NaOH(aq) Whataretheresultsofthesetests? results in test 2results in test 1 more precipitate with Ba more precipitate with Ba more precipitate with Mg more precipitate with Ba more precipitate with Ba more precipitate with Mg more precipitate with Mg more precipitate with Mg ammonium chlorideA ammonium sulfateB sodium chlorideC sodium hydroxideD effect on pH of soil higher percentage of nitrogen by mass decreaseammonium nitrateA increaseammonium nitrateB decreaseammonium sulfateC increaseammonium sulfateD J dissolves in water to give an aqueous solution K. K gives a dense white precipitate when aqueous silver nitrate is added. When heated with aqueous potassium hydroxide, K gives off a gas that turns moist universal indicator paper blue. What is J? Ammonium sulfate, (NH , and ammonium nitrate, NH , are used as fertilisers. These salts have different percentages by mass of nitrogen. They have the same effect as each other on the pH of wet neutral soil. Which row is correct? catalyticconverter.

Whichstatementiscorrect? The catalyst used is finely divided iron.A The reaction prevents greenhouse gas emissions into the atmosphere.B The reaction reduces the possibility of the formation of photochemical smog.C The reaction results in increased ozone depletion.D Which compound has the molecular formula C O?25 ABCD The general formula for a non-cyclic alcohol is C 2n+1OH. How many different structural isomers are there forn= 3 andn=4? n=4n=322A42B43C83D CompoundX,C ,hasonechiralcarbonatompermolecule.CompoundXproducesbubbles withNabutnotwithNa WhichformulacouldrepresentcompoundX? (CH C(OH)CO HOCH CH(CH)CO C(CH )(OH)CO CH(OH)CH(CH)CO Ethane reacts with an excess of chlorine in the presence of ultraviolet light to form a mixture of products. How many of these products contain two carbon atoms and one or more chlorine atoms? 9D8C7B6A When bromoethane reacts with hot ethanolic sodium hydroxide a colourless gas is formed. This gas decolourises aqueous bromine. What is the colourless gas? 1,2-dibromoethaneA ethanolB etheneC hydrogen bromideD Like alkenes, alkynes take part in addition reactions. A saturated compound can be formed. Propyne, C , undergoes an addition reaction with an excess of hydrogen bromide in two stages. Markovnikov's rule applies to the addition of HBr at each stage. What is the main product obtained when propyne reacts with an excess of hydrogen bromide? BrCHBrA CHBr CHBrCHBrCCBr Bromine reacts with alkenes by an electrophilic addition mechanism in which a cation is formed as an intermediate. Which mixture will produce the most stable intermediate cation? 3,3-dimethylpent-1-ene + bromineA ethene + bromineB methylpropene + bromineC propene + bromineD Halogenoalkanes react with hot ethanolic potassium cyanide. The reaction mechanism is either S 1orS Which statement is correct? All secondary halogenoalkanes react by the S 2 mechanism only.A mechanism. Chloroethane reacts with cyanide ions by the S 1 mechanism only.C The S 2 mechanism involves a short-lived negatively charged transition state.D X, Y and Z are three isomeric alcohols.XCHYCH CH(OH)CH Z(CH C(OH)CH Separatesamplesofeachalcoholarewarmedwithamildoxidisingagentandtheresultsnoted. Oneofthesealcohols,whendehydrated,willgiveapairofcis-transisomerswithmolecularformula Whichrowiscorrect? gives cis/trans isomers reacts with mild oxidising reagents Y onlyX, Y and ZA Z onlyX, Y and ZB Y onlyX and Y onlyC Z onlyX and Y onlyD Compound G gives a pale yellow precipitate with alkalineI

What could be compound G? 2-methylpentan-2-olD The mechanism for the reaction between ethanal and hydrogen cyanide starts with the step shown.35H C What is the correct structure of the intermediate ion formed, and what is the next step in this mechanism?HCNH CHCNH C H CHHCNHCN Which compound reacts with 2,4-dinitrophenylhydrazine reagent but doesnotreact with Tollens' reagent? COCO CH(OH)CHOB COCHOC CH(OH)CH Compound X has stereoisomers and forms a precipitate when warmed with Fehling's reagent. What could be the structure of compound X? Which reaction will form propanoic acid?38 acidic hydrolysis of propyl ethanoateA alkaline hydrolysis of ethyl propanoateB acidic hydrolysis of propanenitrileC acidic hydrolysis of ethanenitrileD Lactide is an intermediate in the manufacture of a synthetic fibre.39 lactide Which compound, on heating with an acid catalyst, can produce lactide? hydroxyethanoic acidA 2-hydroxybutanoic acidB 2-hydroxypropanoic acidC 3-hydroxypropanoic acidD The diagram shows the relative abundance of different isotopes of lead in a sample of lead ore. The abundance of 208 is half that of 206. The abundances of 208 and 209 are equal. % abundance 206 207 208 209 What is the relative atomic mass of the lead in the sample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u & PRO $YRJDGURFRQVWDQWL u PRO HOHFWURQLFFKDUJHe ±u PRODUYROXPHRIJDVV P GP PRO DWVWS N3DDQG . P GP PRO DWURRPFRQGLWLRQVZ uPRO DW . q& VSHFLILFKHDWFDSDFLW\RIZDWHUc N- NJ- J Group The Periodic Table of Elements hydrogen 1.0 He helium 4.0 1213 14 15 16 17 18 3 4 5 6 7 8 9 10 11 123Li lithium 6.9 beryllium 9.0 atomic number atomic symbolKey name relative atomic mass sodium 23.0 magnesium 24.3 potassium 39.1 calcium 40.1 rubidium 85.5 strontium 87.6 caesium 132.9 barium 137.3 francium Ra radium boron 10.8 13 Al aluminium 27.0 31 Ga gallium 69.7 49 In indium 114.8 thallium 204.4 carbon 12.0 14 Si silicon 28.1 32 Ge germanium 72.6 50 Sntin 118.7 82 Pb lead 207.2 titanium 47.9 40 Zr zirconium 91.2 72 Hf hafnium 178.5 rutherfordium vanadium 50.9 41 Nb niobium 92.9 73 Ta tantalum 180.9 105 Db dubnium chromium 52.0 42 Mo molybdenum 95.9 74 W tungsten 183.8 106 Sg seaborgium manganese 54.9 43 Tc technetium rhenium 186.2 107 Bh bohrium iron 55.8 44 Ru ruthenium 101.1 76 Os osmium 190.2 108 Hs hassium Co cobalt 58.9 45 Rh rhodium 102.9 iridium 192.2 109 Mt meitnerium nickel 58.7 46 Pd palladium 106.4 platinum 195.1 11 0 Ds darmstadtium copper 63.5 47 Ag silver 107.9 79 Au gold 197.0 111 Rg roentgenium zinc 65.4 48 Cd cadmium 112.4 80 Hg mercury 200.6 11 2 Cn copernicium 11 4 flerovium 11 6 livermorium nitrogen 14.0 phosphorus 31.0 33 As arsenic 74.9 51 Sb antimony 121.8 bismuth 209.0 oxygen 16.0 sulfur 32.1 34 Se selenium 79.0 52 Te tellurium 127.6 84 Po polonium fluorine 19.0 17 Cl chlorine 35.5 35 Br bromine 79.9 iodine 126.9 Ne neon 20.2 18 Ar argon 39.9 36 Kr krypton 83.8 54 Xe xenon 131.3 86 Rn radon 11 3 nihonium 11 5 moscovium 11 7 tennessine 11 8 oganesson scandium 45.0 yttrium 88.9 57-71 lanthanoids 89-103 actinoids 57La lanthanum 138.9 89 Ac lanthanoids actinoids actinium Ce cerium 140.1 90 Th thorium 232.0 praseodymium 140.9 91 Pa protactinium 231.0 neodymium 144.4 uranium 238.0 promethium neptunium samarium 150.4 94 Pu plutonium europium 152.0 95 Am americium gadolinium 157.3 96 Cm curium terbium 158.9 97 Bk berkelium dysprosium 162.5 californium holmium 164.9 99 Es einsteinium erbium 167.3 100 Fm fermium Tm thulium 168.9 101 Md mendelevium ytterbium 173.1 102 No nobelium lutetium 175.0 lawrencium