1 Hexan-3-ol is an alcohol. CH3 CH2 CH CH2 CH2 CH3 OH hexan-3-ol hexan-3-ol? A 2 9 B 10 C 18 D 19 An organic compound, P, is dissolved in water. The concentration of the solution is 0.1 and the pH is 3. mol / dm3 A solid is added to the solution and effervescence is seen. Which equation could represent this reaction? 3 4 A 2CH3CO2H(aq) + Mg(s) (CH3CO2)2Mg(aq) + H2(g) B 2CH3CO2H(aq) + 2Mg(s) 2CH3CO2Mg(aq) + H2(g) C 2CH3CO2H(aq) + K2CO3(s) (CH3CO2)2K(aq) + CO2(g) + H2O(l) D 2HCl (aq) + K2CO3(s) 2KCl (aq) + CO2(g) + H2O(l) Which equation shows the reaction of ethane with chlorine in the presence of ultraviolet light? A C2H6 + Cl 2 C2H6Cl 2 B C2H6 + Cl 2 C2H4Cl 2 + H2 C C2H6 + Cl 2 C2H5Cl + HCl D C2H6 + Cl 2 2CH3Cl The table shows some of the fractions obtained by the fractional distillation of petroleum and their uses. fraction use 1 bitumen making roads 2 kerosene / paraffin chemical feedstock 3 naphtha jet fuel 4 refinery gases heating and cooking Which rows are correct? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4 34 What is the displayed formula of propyl methanoate? A H O B O H H H C C C C H H H H H H C O H H C C C H H H C O H C C H H C C C H H H H H The structures of three compounds, W, X and Y, are shown. H H H C C O H H OH CH3 C O O C H CH3 CH3 CH2 COOH CH3 OH C OH W X Y Which statements about these three compounds are correct? A 1 W and Y are both alcohols and X is a carboxylic acid. 2 W, X and Y have the same molecular formula. 3 W and Y are structural isomers of each other. 1 and 2 only H D H H 33 O B 1 and 3 only C 2 and 3 only D 37 The structure of an ester is shown. H H C H O C O H H H C C C H H H Which two compounds react to form this ester? A butan-1-ol and methanoic acid B ethanol and propanoic acid C propan-1-ol and ethanoic acid D propan-1-ol and methanoic acid H 1, 2 and 3 CH2OH 34 What is the structural formula of propyl methanoate? A CH3COOCH2CH2CH3 B CH3COOCCH2CH3 C CH3CH2COOCH3 D CH3CH2CH2OOCH 35 Which statement about ethane is correct? A Each ethane molecule contains exactly seven bonds, all of which are single covalent bonds. B Ethane is a member of the homologous series of alkanes, a family of unsaturated hydrocarbons. C The equation for the complete combustion of ethane is C2H6 + 3O2 → 2CO2 + 3H2O. D When a molecule of ethane reacts with chlorine, one hydrogen atom is replaced by a chlorine molecule. 36 Isoprene is an alkene which is commonly found in plants. Which properties does isoprene have? A 1 It burns in air. 2 It can form polymers. 3 It decolourises aqueous bromine. 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only 34 The displayed formulae of two organic compounds are shown. 1 2 H H C O O H H H What are the names of these compounds? compound 1 compound 2 A methanoic acid ethyl methanoate B methanoic acid methyl ethanoate C methanol ethyl methanoate D methanol methyl ethanoate C O H H C C H H H 32 Which compounds are in the same homologous series? A CH3CH2CH2CH3, CH3CHCHCH3 and CH3CH(CH3)CH3 B CH2CHCH3, CH3CH2CHCH2 and CH2CHCH2CH3 C CH3CHOHCH3, CH3CH2CH2OH and CH3CH2COOH D CH3CH2CH3, CH3CH2CH2CH3 and CH2CHCH2CH2CH3 33 The diagrams show four structures of C4H8. 1 2 H C C H C H H C H 4 C H H C H C H H H H H H 3 H H H C C H H H C H C H H C H C H H C H H C H C H H H Which structures represent the same molecule? A 1 and 2 B 1 and 3 C 2 and 3 D 2 and 4 35 Two products of the separation of petroleum are the lubricating oil fraction and the kerosene / paraffin fraction. Which statement is correct? A The lubricating oil fraction is more viscous than the kerosene / paraffin fraction. B The lubricating oil fraction is more volatile than the kerosene / paraffin fraction. C The lubricating oil fraction has lower boiling points than the kerosene / paraffin fraction. D Molecules in the lubricating oil fraction have smaller chain lengths than molecules in the kerosene / paraffin fraction. 36 An incomplete equation for the reaction of propane with chlorine is shown. C3H8 + Cl 2 C3H7Cl + X A student writes three statements about this reaction. 1 The activation energy for this reaction is provided by ultraviolet light. 2 C3H7Cl has two different structural formulae. 3 X is an acidic gas. Which statements are correct? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only 13 37 Glycerol is an alcohol with three –OH groups per molecule. glycerol H H H H C C C H OH OH OH What is the equation for the combustion of glycerol? A C3H8O 3 + 5O 2 3CO 2 + 4H 2O B 2C 3H8O 3 + 3O 2 6CO 2 + 8H 2 C 2C 3H8O 3 + 7O 2 6CO 2 + 8H 2O D 4C 3H5O3 + 11O 2 12CO 2 + 10H 2O VII ). 38 Compound X decolourises acidified aqueous potassium manganate( Compound X has the empirical formula C 2H 5O. Some possible structures of X are shown. 1 H 2 H H C C H H HO OH H H H H C C C C H H OH H 3 HO H 4 H H H H C C C C H H H H H OH H H H C C C H H H O C OH Which structures could be correct for compound X? A 1, 2 and 3 B 1 only C 2 and 3 only D 3 and 4 39 Which statement is correct? A A filtrate is left on the filter paper during filtration. B A saturated solution contains only substances with single bonds. C A solute is a substance that dissolves a solvent. D A solution can never be described as pure. © UCLES 2023 5070/11/O/N/23 [Turn over