35 Which reaction has a nucleophilic addition mechanism and gives a good yield of product underthe stated conditions?A 1-bromopropane reacting with hot ethanolic sodium hydroxideB 2-iodopropane reacting with hot aqueous sodium hydroxideC propanal reacting with hydrogen cyanide under alkaline conditionsD propanal reacting with hydrogen cyanide under acidic conditions36 A carbonyl compound has the structural formula CH 3COCHO.Which row is correct for the observations made when this compound is treated with the givenreagents?2,4-DNPH reagent Fehling’s reagentA silver mirror red precipitateB silver mirror orange precipitateC orange precipitate silver mirrorD orange precipitate red precipitate37 An ester is shown.CHHCHHCOOHCCCCHHHHHHHH HWhich two compounds react to form this ester?A 2-methylpropan-1-ol and propanoic acidB 2-methylpropan-2-ol and propanoic acidC propan-1-ol and 2-methylpropanoic acidD 2-methylpropan-2-ol and ethanoic acid15© UCLES 2022 9701/13/M/J/2238 Which compound can be used to make propanoic acid by treatment with a single reagent?A CH2=CHCH 2CH3B CH3CH2 CH2 CNC CH3CH(OH)CND CH3CH(OH)CH 339 A sample of sulfur consists mostly of 32S. It also contains 4.2% 34S and 2.8% 36S. No otherisotopes of sulfur are present.What is the relative atomic mass, Ar , of this sample of sulfur?A 32.1 B 32.2 C 34.0 D 34.340 One molecule of an addition polymer containing 2000 repeat units has an Mr of 112 000.The polymer molecule contains chiral centres.What is a possible monomer for this polymer?A CH 2=CHCH 3B CH 2=C(CH 3) 2C CH 2=CHCH 2CH3D CH 2=CHCH 2CH2CH3