ALLOW CO 2 and CO 2 H CH 3
|
|
- Sharyl Chambers
- 5 years ago
- Views:
Transcription
1 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 1 (a) (i) The p R point at which the zwitterion exists 1 ALLW p/point at which there is no overall/net charge IGRE p/point at which there is no charge/ neutral charge ie overall/net is required ALLW p/point at which contains C AD 3 + (ii) 3 C C 3 C C ALLW C 3 C( 3 ) + C ALLW C 3 C( 3 ) + C ALLW C and C C 3 C 3 ALLW + charge on or : ie + 3 or 3 + D T ALLW charge on C: ie C D T ALLW or C 3 missing ALLW correct structural R displayed R skeletal formula ALLW combination of formulae as long as unambiguous 1
2 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 1 (a) (iii) p < 3: C ALLW carboxyl group R carboxylic acid D T ALLW acid R just carboxylic (without acid ) p > 10: ALLW amino group R amine D T ALLW if give correct formula but wrong name or correct name and wrong formula eg and amide IF any carbon chain is shown attached to BT functional groups ALLW 1 mark eg C C AD C for 1 mark C 3 C AD C 3 for 1 mark RC AD R for 1 mark (b) IF functional groups are shown the wrong way round, ALLW 1 mark i.e. C D T ALLW more repeat units IGRE brackets and n ALLW end bonds shown as D T ALLW if end bonds are missing peptide link must be fully displayed, i.e. ALLW terminal on right (R C= on left), ie TW repeat units shown correctly IF peptide bond is shown not displayed, i.e. C, nd mark can still be awarded
3 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 1 (c) (i) There is no chiral carbon ALLW there is no asymmetric carbon R there is no asymmetry in the molecule 1 R it has no non-superimposable mirror image R there are not four different atoms/groups of atoms (attached to carbon) R there are only three different atoms/groups of atoms (attached to carbon) R because there are two hydrogen atoms on the carbon (ii) ALLW Add the same 3-D structure repeated but with groups swapped as after rotation the nd isomer is a mirror image of the first, i.e. Connectivity: Chiral C must be linked to the C of the C, the C of the C S and the of the (ie connectivity is being tested) ie, ALLW as in the example but D T ALLW an attempted shown as below: The nd mark is for the mirror image of CRRECT optical isomer only CARE: may be orientated differently D T penalise connectivity more than once Each structure must have four central bonds, with at least one wedge in AD one wedge out 3
4 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME For bond into plane of paper, ALLW: For bond out of plane of paper, a solid wedge is expected, either way around: ALLW a hollow wedge for in bond R an out bond, provided it is different from the other in or out wedge eg: ALLW examples of other 3-D representations provided they are possible: i.e. CARE: This is a 3-D representation so this is possible and the bonds are clearly not 90º to one another 4
5 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 1 (c) (iii) ATATIS MUST BE USED Disadvantages: any two from: (one stereoisomer might have harmful/adverse) side IGRE harmful/adverse effects only effects reduces the (pharmacological) activity/effectiveness cost of separating stereoisomers R difficulty in separating stereoisomers ALLW a response that implies an increased dose IGRE it takes time to separate Synthesis of a single optical isomer any two from: using enzymes or bacteria using (chemical) chiral synthesis R using chiral catalysts using (natural) chiral molecules/compounds ALLW biological catalysts ALLW chiral transition metal complex/catalyst R stereoselective transition metal complex/catalyst ALLW 'chiral pool' R L-amino acids / D-sugars Quality of Written Communication For full marks to be awarded for this question chiral R enzyme R bacteria R catalyst must be spelled correctly at least once in the correct context 5
6 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 1 (d) amino acid isoleucine leucine tyrosine number of peaks mark for each number (e) ALLW correct structural R displayed R skeletal formula ALLW combination of formulae as long as unambiguous Common errors: Look for on first structure and on second structure valine anhydride proline anhydride Total 19 6
7 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME (a) (i) Response requires three stages Acceptable sequence of stages are: chlorination nitration, reduction, chlorination nitration nitration, chlorination, reduction, reduction chlorination, nitration, reduction Reduction must be a later stage than nitration Mark according to which sequence chosen. Stage 1 organic product: Cl R chemicals: Cl AD AlCl 3 R 3 AD S 4 Stage organic product: Cl R For organic products, ALLW C 6 5 R C 6 5 Cl R C 6 5 ALLW AD D T ALLW ClC 6 4 (formula ambiguous) D T ALLW molecular formulae IGRE any additional structures shown eg - (ortho) and 3- (meta) substituted isomers In chemicals boxes, IGRE temperatures IGRE catalyst For chlorination chemicals, ALLW Cl AD FeCl 3 R Cl AD Fe R Cl AD halogen carrier For nitration chemicals, concentrated not required for 3 R S 4 BUT... D T ALLW dilute chemicals: 3 AD S 4 R Sn AD Cl Stage 3 chemicals: Cl AD AlCl 3 R Sn AD Cl 5 For reduction chemicals, concentrated Cl not required but D T ALLW dilute For Sn/Cl ALLW addition of a also IF it is clear that it is a second step BUT. D T ALLW Sn AD Cl AD a IGRE catalyst 7
8 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME (a) (ii) diazonium ion ALLW + sign up to halfway along triple bond from left-hand Cl group MUST be displayed IGRE presence of Cl D T ALLW Cl substituent on benzene ring D T ALLW: Cl azo dye Cl = group MUST be displayed In azo dye, ALLW as alternative to phenol group: R a + R a ALLW phenol part substituted at any carbon (ie,3 or 4 position for ) i.e. IGRE geometry/shape, i.e. ALLW = Mark independently D T ALLW if Cl is missing from benzene ring in EITER structure 8
9 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME (b) δ mark S δ+ S mark 1 step 1 mark 4 + intermediate = mark 3 4 ATATIS MUST BE USED mark 1 curly arrow from π-delocalised ring in benzene to S δ+ in S 3 ALLW curly arrow from the ring R from within the ring mark curly arrow from one S= double bond to the (to produce a S ) ALLW curly arrow to any in S 3 mark 3 intermediate showing delocalisation over 5 carbons Intermediate must have correct S 3 structure FULLY displayed D T ALLW intermediate with broken ring less than halfway up in correct orientation: + mark 4 curly arrow from C bond reforming π- delocalised ring in benzene Stand alone mark IGRE responses after STEP 9
10 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME ALLW Kekulé mechanism δ mark S δ+ S mark 1 mark 4 step 1 + intermediate = mark 3 ALLW double bonds shown in other Kekulé arrangement (c) (i) Various possibilities, eg: Br ALLW 1,, 3 or 4 Br atoms substituted on phenol ring at carbon atoms, 3, 5 or 6 BUT must be in correct position shown D T ALLW or a 3 C C ALLW for side chain: C 3 C but aromatic part of structure must be shown Br IGRE any additional inorganic products in boxes (even if incorrect Reaction with a ALLW a R as alternative to a + D T ALLW a R a (i.e. a without charge) 3 C C - a + a must be in correct position shown ALLW for side chain: C 3 C but aromatic part of structure must be shown IGRE any additional inorganic products in boxes (even if incorrect) 10
11 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME (c) (ii) ydrolysis with a(aq) n BT structures, ALLW a R as alternative to a + D T ALLW a R a (i.e. a without charge) 3 C C - a + a must be in correct position shown on nd structure ALLW C 3 Ca/ C 3 C a R C 3 C / C 3 C - a + ALLW one mark for carboxylic acid AD phenol, rather than sodium salts: Mark independently 3 C C ALLW, C 3 Total 15 IGRE any additional inorganic products in boxes (even if incorrect) 11
12 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 3 (a) (i) ne mark is for positive carbonyl test (Add),4-dinitrophenylhydrazine AD orange/yellow/red precipitate ALLW errors in spelling ALLW,4(-)DP R,4(-)DP ALLW Brady s reagent or Brady s Test ALLW solid R crystals R ppt as alternatives for precipitate ne mark is for negative aldehyde test EITER (Add) Tollens reagent/tollens test AD no change R no reaction R no silver (mirror) ALLW Ag 3 / 3 (Formulae must be correct) R ammoniacal silver nitrate ALLW Fehling s solution R Benedict s solution AD no (brick-red) precipitate ALLW any response that implies that nothing happens ie no change R no reaction R no silver (mirror) ALLW the aldehyde/pentanal gives a silver mirror (ii) R (Add) S 4 AD K Cr 7 AD no change R no reaction R no green colour 1st mark Take melting point of orange crystals/derivative/product from,4-dp ALLW + AD Cr 7 (Formulae must be correct) ALLW any response that implies that nothing happens IGRE responses using ab 4 (as no observations) TE: a(ii) is marked completely independently of a(i) nd mark Compare melting point with known values R compare melting point with value in database/reference book Mark independently of response for 1st mark D T ALLW 1st or nd marks for taking and comparing boiling points R chromatograms 1
13 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 3 (b) (i) Synthesis 1 6 TE: ALL Structures MUST have s shown IGRE bond angles D T ALLW more than one repeat unit C C C IGRE brackets and n Ester linkage must be fully displayed ALLW terminal on right (R C= on left), i.e. C C C ALLW end bonds shown as D T ALLW if structure has no end bonds Synthesis C C C C C C 13
14 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME Synthesis 3 Mark each structure independently must be connected correctly on BT structures C C C C C C D T ALLW more repeat units IGRE brackets and n C C C C C C ALLW terminal on right (R C= on left), i.e. C C C C C C ALLW end bonds shown as D T ALLW if structure has no end bonds D T ALLW ECF from wrong structure in previous boxes 3 (b) (ii) Synthesis 1: condensation AD Synthesis : addition AD Synthesis 3: condensation Total 11 1 All three correct responses required for the mark 14
15 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 4 (a) (C 3 C) + C 3 C()C 3 C 3 CC(C 3 ) + C 3 C 1st mark Correct structure of ester: C 3 CC(C 3 ) nd mark Equation contains correct formulae for (C 3 C), C 3 C()C 3 AD C 3 C ALLW correct structural R displayed R skeletal formula ALLW combination of formulae as long as unambiguous D T ALLW molecular formulae ALLW (C 3 ) CCC 3 R (C 3 ) CCC 3 (b) (i) (relative) solubility 1 IGRE partition (ii) The esters would have similar retention times AD similar structures/molecules R same functional groups R similar polarities R similar solubilities Alcohol would have short retention time AD alkane would have long retention time D T ALLW adsorption R absorption IGRE similar properties 15
16 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME 4 (c) Elemental analysis and molecular formula marks Use of percentages (to find EF) AD 144 Molecular formula = C 8 16 marks ATATIS MUST BE USED Working C : : = 66.63/1 : 11.18/1 :.19/ : : : 8 : 1 Alternative method: carbon: (144 x 66.63/100)/1 = 8 hydrogen: (144 x 11.18/100)/1 = 16 oxygen: (144 x.19/100)/16 = ester structure 4 marks C 3 3 C C C C C C 3 C 3 4 marks ALLW correct structural R displayed R skeletal formula ALLW combination of formulae as long as unambiguous ECF from earlier structures If not fully correct award following marks: If structure an ester of formula C 8 16 R the organic structure contains C(C 3 ) 3 If structure is an ester of formula C 8 16 AD ester contains C(C 3 ) 3 If structure is an ester of formula C 8 16 AD ester contains C C(C 3 ) 3 AD ester contains C 3 C C i.e. If the ester link is reversed C 3 C 3 C C C C C 3 IGRE any name C 3 16
17 CERRY ILL TUITI CR A CEMISTRY A PAPER 1 MARK SCEME F34 Mark Scheme January 01 MR analysis 4 marks TE: Each peak can be identified from: its δ value: ± 0. ppm a range, eg the peak between and 3 its relative peak area (CARE two peaks have an area of ) its splitting (CARE: two peaks are singlets) labelling on the spectrum Triplet (at δ 1.3) shows an adjacent C R triplet (at δ 1.3) shows (C with) adjacent s/protons (because of splitting: so triplet) QWC: triplet must be spelled correctly ALLW neighbouring s for adjacent to s Peak at (δ). shows adjacent to C= AD adjacent to (C with) no hydrogens (because of no splitting: so singlet) For peak at (δ). ALLW singlet at (δ). ALLW singlet labelled Peak at (δ) 4. shows C AD adjacent C 3 R 3 adjacent s/protons (because of splitting: so quartet) Peak at (δ) 0.9 show 3 x C 3 (because of singlet and area 9) 4 marks Total for 4(c) 10 Total 15 For peak at (δ) 4. ALLW quartet (labelled ) Check back for any responses added to spectra ADD ^ MARK T TE SPECTRUM PAGE T SW TAT IT AS BEE LKED AT 19 17
PMT GCE. Chemistry A. Advanced GCE. Unit F324: Rings, Polymers and Analysis. Mark Scheme for January Oxford Cambridge and RSA Examinations
GCE Chemistry A Advanced GCE Unit F324: Rings, Polymers and Analysis Mark Scheme for January 2012 xford Cambridge and RSA Examinations CR (xford Cambridge and RSA) is a leading UK awarding body, providing
More informationAcceptable sequence of stages are: chlorination. nitration, reduction, chlorination nitration. nitration, chlorination, reduction, reduction
Question er Mark Guidance 1 (a) (i) Response requires three stages Acceptable sequence of stages are: chlorination nitration, reduction, chlorination nitration nitration, chlorination, reduction, reduction
More informationCHERRY HILL TUITION OCR A CHEMISTRY A2 PAPER 19 MARK SCHEME ANNOTATIONS MUST BE USED CH 3 CH 3 CH 3 H + correct products
ERRY ILL TUITIN R A EMISTRY A2 PAPER 19 MARK SEME ALLW Kekulé structures throughout 1 (a) ANNTATINS MUST BE USED ALLW skeletal ALLW + + N 2 R N 2 ALLW 1st curly arrow from the ring R from within the ring
More information1 (a) (CH 3 CO) 2 O + CH 3 CH(OH)CH 3 CH 3 COOCH(CH 3 ) 2 + CH 3 COOH
Question er Mark Guidance 1 (a) ( 3 ) 2 + 3 () 3 3 ( 3 ) 2 + 3 1st mark orrect structure of ester: 3 ( 3 ) 2 2nd mark Equation contains correct formulae for ( 3 ) 2, 3 () 3 AND 3 2 ALLW correct structural
More informationQuestion Answer Marks Guidance 1 (a) M1 EITHER in words: (pyruvic acid forms) hydrogen bonds with water
1 (a) M1 EITER in words: (pyruvic acid forms) hydrogen bonds with water 2 R correctly labelled diagram showing hydrogen bond between pyruvic acid and water FR M1 only: if use diagram ALLW a labelled hydrogen
More informationANNOTATIONS MUST BE USED
1 (a) ATATIS MUST BE USED ALLW skeletal ALLW R ALLW 1st curly arrow from the ring R from within the ring to any part of the 2 including the charge H D T ALLW intermediate with broken ring less than halfway
More informationQuestion Answer Mark Guidance 1 (a) monomers join/bond/add/react/form polymer/form chain AND another product/small molecule e.g.
Question Answer Mark Guidance (a) monomers join/bond/add/react/form polymer/form chain AND another product/small molecule e.g. 2 /l IGNRE two when referring to monomers, ie (two) monomers... (b) (i) QW
More information(b) (i) Compound B AND M + /molecular ion peak (at m/z) = 124
Answer Mark Guidance 1 (a) (Relative) solubility (in stationary phase) 1 ALLW how well the compound dissolves IGNRE retention time AND partition D NT ALLW adsorption R absorption (b) (i) Compound B AND
More informationF324 Mark Scheme January 2010 F324 Rings, Polymers and Analysis. Question Expected Answers Marks Additional Guidance 1 (a)
F324 Rings, Polymers and Analysis Question Expected Answers Marks Additional Guidance 1 (a) ALLW 6 6 + Br 2 6 5 Br + Br + Br 2 Br + Br (b) (i) White precipitate R white solid R white crystals 1 D T ALLW
More informationMark Scheme Page 1 of 8 Unit ode 2814 Session Jan Year 2004 Qu. Expected answers: Marks: 1 (a) (i) (relative) molecular mass / M r (ii) right / highest m /e / highest mass / second highest mass etc AW
More information2 Answer all the questions.
ERRY ILL TUITI R A EMISTRY A2 PAPER 17 2 Answer all the questions. 1 A chemist was investigating the reactions of benzene, phenol and cyclohexene with bromine. She found that they all reacted with bromine
More informationQuestion Answer Mark Guidance 1 (a) (i) M1 p-orbitals overlap (to form pi/π-bonds) 4 ANNOTATE ANSWER WITH TICKS AND CROSSES ETC
Question Answer Mark Guidance (a) (i) M p-orbitals overlap (to form pi/π-bonds) 4 ANNOTATE ANSWER WIT TICKS AND CROSSES ETC IGNORE p-orbitals overlap to form sigma bonds M2 π-bond(s) are delocalised in
More informationAcceptable Answers Reject Mark. Acceptable Answers Reject Mark. ALLOW Iron/Fe or Zn/Zinc for tin Conc for concentrated. Acceptable Answers Reject Mark
(a)(i) (a)(ii) Concentrated nitric acid AND concentrated sulfuric acid concentrated nitric and sulfuric acids Concentrated HNO and concentrated H SO 4 Extra reagents To prevent multiple substitutions/
More informationGCE. Chemistry. Mark Scheme for June Advanced GCE 2814/01 Chains, Rings and Spectroscopy. Oxford Cambridge and RSA Examinations
GE hemistry Advanced GE 2814/01 hains, Rings and Spectroscopy Mark Scheme for June 2010 xford ambridge and RSA Examinations R (xford ambridge and RSA) is a leading UK awarding body, providing a wide range
More informationNitrogen Compounds - MS 1. (a) (i) is an amine and a carboxylic acid / contains both NH2 and COOH functional groups (1) AW 1
itrogen ompounds - MS. (a) (i) is an amine and a carboxylic acid / contains both and functional groups () AW (c) R( ) () R Does not fit the formula because and are not attached to the same carbon () AW
More information2 Answer all the questions. CH(NH 2. )COOH, R is CH [1] (ii) Draw the structures of the ions formed by alanine at ph 6.0 and at ph 1.5.
2 Answer all the questions. 1 This question looks at the properties and chemistry of some α-amino acids. The general formula of an α-amino acid is R(N 2 ). (a) In the α-amino acid alanine, 3 (N 2 ), R
More informationGCE A level 1094/01 CHEMISTRY CH4
Surname ther Names Centre 2 Candidate GCE A level 1094/01 CHEMISTRY CH4 P.M. MNDAY, 14 January 2013 1¾ hours ADDITINAL MATERIALS In addition to this examination paper, you will need: Data Sheet Periodic
More informationPMT GCE. Chemistry A. Advanced GCE Unit F324: Rings, Polymers and Analysis. Mark Scheme for January Oxford Cambridge and RSA Examinations
GE hemistry A Advanced GE Unit F324: Rings, Polymers and Analysis Mark Scheme for January 2013 xford ambridge and RSA Examinations R (xford ambridge and RSA) is a leading UK awarding body, providing a
More informationBenzedrine is a pharmaceutical which stimulates the central nervous system in a similar manner to adrenalin. Benzedrine Adrenalin
1. Adrenalin is a hormone which raises blood pressure, increases the depth of breathing and delays fatigue in muscles, thus allowing people to show great strength under stress. Benzedrine is a pharmaceutical
More informationWhere circles have been placed round charges, this is for clarity only and does not indicate a requirement. ALLOW delocalised carboxylate.
Question (a) Answer Mark Guidance Where circles have been placed round charges, this is for clarity only and does not indicate a requirement (i) ALLOW correct structural OR displayed OR skeletal formulae
More informationAlcohols. Nomenclature. 57 minutes. 57 marks. Page 1 of 9
..0 Alcohols Nomenclature 57 minutes 57 marks Page of 9 M. (a) % O =.6 % () If % O not calculated only M available C O () = 5. =.5 =.5 Ratio: : 0: ( C 0 O) () If arithmetic error in any result lose M If
More informationTHIS IS A NEW SPECIFICATION
TIS IS A EW SPEIFIATI ADVAED GE EMISTRY A Rings, Polymers and Analysis F324 * E / 1 5371* andidates answer on the Question Paper R Supplied Materials: Data Sheet for hemistry A (inserted) ther Materials
More informationThursday 26 January 2012 Afternoon
Thursday 26 January 2012 Afternoon A2 GE EMISTRY A F324 Rings, Polymers and Analysis *F314460112* andidates answer on the Question Paper. R supplied materials: Data Sheet for hemistry A (inserted) ther
More informationChapter 16. Answers to examination-style questions. Answers Marks Examiner s tips. 1 (a) (i) C 6 H 12 O 6 2C 2 H 5 OH + 2CO 2 (ii) fermentation
Chapter 6 (a) (i) C 6 O 6 C 5 O + CO (ii) fermentation (b) (i) C 5 O + 3O CO + 3 O (ii) CO or carbon monoxide or C or carbon (a) (i) potassium (or sodium) dichromate(vi) or correct formula or potassium
More informationPMT GCE. Chemistry A. Advanced GCE Unit F324: Rings, Polymers and Analysis. Mark Scheme for June Oxford Cambridge and RSA Examinations
GCE Chemistry A Advanced GCE Unit F324: Rings, Polymers and Analysis Mark Scheme for June 2013 xford Cambridge and RSA Examinations CR (xford Cambridge and RSA) is a leading UK awarding body, providing
More informationPMT GCE. Chemistry A. Advanced GCE F324. Mark Scheme for June Oxford Cambridge and RSA Examinations
GE hemistry A Advanced GE F324 Mark Scheme for June 200 xford ambridge and RSA Examinations R (xford ambridge and RSA) is a leading UK awarding body, providing a wide range of qualifications to meet the
More informationSubject: Chains, Rings and Spectroscopy Code: Session: June Year: Final Mark Scheme
Subject: hains, Rings and Spectroscopy ode: : e : Mark Scheme MAXIMUM MARK 90 ADVIE T EXAMINERS N TE ANNTATIN F SRIPTS 1. Please ensure that you use the final version of the Mark Scheme. You are advised
More informationGCE Chemistry A. Mark Scheme for June Unit F324: Rings, Polymers and Analysis. Advanced GCE. Oxford Cambridge and RSA Examinations
GCE Chemistry A Unit F324: Rings, Polymers and Analysis Advanced GCE Mark Scheme for June 2017 Oxford Cambridge and RSA Examinations OCR (Oxford Cambridge and RSA) is a leading UK awarding body, providing
More informationMolecular Geometry: VSEPR model stand for valence-shell electron-pair repulsion and predicts the 3D shape of molecules that are formed in bonding.
Molecular Geometry: VSEPR model stand for valence-shell electron-pair repulsion and predicts the 3D shape of molecules that are formed in bonding. Sigma and Pi Bonds: All single bonds are sigma(σ), that
More informationCHEMISTRY Chains, Rings and Spectroscopy. OXFORD CAMBRIDGE AND RSA EXAMINATIONS Advanced GCE. 1 hour 30 minutes
XFRD CAMBRIDGE AND RSA EXAMINATINS Advanced GCE CEMISTRY 2814 Chains, Rings and Spectroscopy Thursday 23 JUNE 2005 Afternoon 1 hour 30 minutes Candidates answer on the question paper. Additional materials:
More information2 Answer all the questions. 1 Alkenes and benzene both react with bromine but alkenes are much more reactive.
2 Answer all the questions. 1 Alkenes and benzene both react with bromine but alkenes are much more reactive. (a) Explain the relative resistance to bromination of benzene compared with alkenes. In your
More informationSurname. Number OXFORD CAMBRIDGE AND RSA EXAMINATIONS ADVANCED GCE F324 CHEMISTRY A. Rings, Polymers and Analysis
Candidate Forename Centre Number Candidate Surname Candidate Number OXFORD CAMBRIDGE AND RSA EXAMINATIONS ADVANCED GCE F324 CHEMISTRY A Rings, Polymers and Analysis WEDNESDAY 27 JANUARY 2010: Morning DURATION:
More information(a) (i) Give the equation representing the overall reaction. (1) Give the equation representing the formation of the electrophile.
1. Benzene reacts with concentrated nitric acid in the presence of concentrated sulphuric acid at about 50 º in an electrophilic substitution reaction to give nitrobenzene. (a) Give the equation representing
More informationPractice paper Set 1 MAXIMUM MARK 100. Final. H432/02 Mark Scheme Practice 1. A Level Chemistry A H432/02 Synthesis and analytical techniques
432/02 Mark Scheme Practice 1 Practice paper Set 1 A Level hemistry A 432/02 Synthesis and analytical techniques MARK SEME Duration: 2 hours 15 minutes MAXIMUM MARK 100 Final This document consists of
More informationName/CG: 2012 Term 2 Organic Chemistry Revision (Session II) Deductive Question
Name/G: 2012 Term 2 rganic hemistry Revision (Session II) Deductive Question 1(a) A yellow liquid A, 7 7 N 2, reacts with alkaline potassium manganate (VII) and on acidification gives a yellow solid B,
More informationAQA Qualifications. A-LEVEL Chemistry. CHEM4 Kinetic, Equilibria and Organic Chemistry Mark scheme June Version: 1.
AQA Qualifications A-LEVEL Chemistry CEM4 Kinetic, Equilibria and rganic Chemistry Mark scheme 2420 June 206 Version:.0 Final Mark schemes are prepared by the Lead Assessment Writer and considered, together
More information3.4 A2 Unit F324: Rings, Polymers and Analysis
3.4 A2 Unit F324: Rings, Polymers and Analysis This unit builds upon the chemical concepts that have been developed during AS Chemistry. This unit consists of three teaching modules: Module 1: Rings, Acids
More informationCHERRY HILL TUITION OCR (SALTERS) CHEMISTRY A2 PAPER Answer all the questions. O, is formed in the soil by denitrifying bacteria. ...
2 Answer all the questions. 1 itrous oxide gas, 2, is formed in the soil by denitrifying bacteria. (a) Give the systematic name for nitrous oxide. ne model of the bonding in nitrous oxide includes a dative
More information1. Study the reaction scheme below, then answer the questions that follow.
1. Study the reaction scheme below, then answer the questions that follow. (a) (i) Butanal contains a carbonyl group. State a chemical test for a carbonyl group and describe the result of the test. Test...
More informationTOK: The relationship between a reaction mechanism and the experimental evidence to support it could be discussed. See
Option G: Further organic chemistry (15/22 hours) SL students study the core of these options and HL students study the whole option (the core and the extension material). TOK: The relationship between
More informationPMT. GCE Chemistry A. Unit F324: Rings, Polymers and Analysis. Advanced GCE. Mark Scheme for June Oxford Cambridge and RSA Examinations
GCE Chemistry A Unit F324: Rings, Polymers and Analysis Advanced GCE Mark Scheme for June 2015 Oxford Cambridge and RSA Examinations OCR (Oxford Cambridge and RSA) is a leading UK awarding body, providing
More informationCHEM J-8 June Complete the following table. Make sure you give the name of the starting material where indicated. REAGENTS/ CONDITIONS
CEM1102 2014-J-8 June 2014 Complete the following table. Make sure you give the name of the starting material where indicated. STARTIG MATERIAL REAGETS/ CDITIS STRUCTURAL FRMULA(S) F MAJR RGAIC PRDUCT(S)
More informationAQA A2 CHEMISTRY TOPIC 4.10 ORGANIC SYNTHESIS AND ANALYSIS TOPIC 4.11 STRUCTURE DETERMINATION BOOKLET OF PAST EXAMINATION QUESTIONS
AQA A2 CHEMISTRY TOPIC 4.10 ORGANIC SYNTHESIS AND ANALYSIS TOPIC 4.11 STRUCTURE DETERMINATION BOOKLET OF PAST EXAMINATION QUESTIONS 1 1. Consider the following reaction sequence. CH 3 CH 3 CH 3 Step 1
More informationTuesday 19 June 2012 Afternoon
Tuesday 19 June 2012 Afternoon A2 GCE CEMISTRY A F324 Rings, Polymers and Analysis *F314730612* Candidates answer on the Question Paper. CR supplied materials: Data Sheet for Chemistry A (inserted) ther
More informationM1. (a) Functional group (isomerism) 1
M. (a) Functional group (isomerism) (b) M Tollens (reagent) (Credit ammoniacal silver nitrate a description of making Tollens ) (Ignore either AgNO or [Ag(NH ) 2 + ] or the silver mirror test on their
More information1 hour 45 minutes plus your additional time allowance
GE A Level 1094/01 EMISTRY 4 P.M. TUESDAY, 14 June 2016 1 hour 45 minutes plus your additional time allowance Surname Other Names entre Number andidate Number 2 WJE BA Ltd. J*(S16-1094-01)MLP 2 For Examiner
More informationElectrophilic substitution Both words needed Ignore minor misspellings 1
M.(a) Electrophilic substitution Both words needed Ignore minor misspellings (b) (i) Sn / HCl H 2 / Ni H 2 / Pt Fe / HCl Zn / HCl SnCl 2 / HCl Ignore conc or dil with HCl, Allow (dil) H 2 SO 4 but not
More informationMechanisms. . CCl2 F + Cl.
Mechanisms 1) Free radical substitution Alkane à halogenoalkane Initiation: Propagation: Termination: Overall: 2) Ozone depletion UV light breaks the C Cl bond releasing chlorine radical CFCl 3 F à. CCl2
More informationCH 3. mirror plane. CH c d
CAPTER 20 Practice Exercises 20.1 The index of hydrogen deficiency is two. The structural possibilities include two double bonds, a double do 20.3 (a) As this is an alkane, it contains only C and and has
More informationADVANCED CHEMISTRY 2
ADVANCED CHEMISTRY 2 Philip Matthews ±m±l CAMBRIDGE UNIVERSITY PRESS Acknowledgements How to use this book INORGANIC CHEMISTRY 88 Periodicity of physical properties 88.1 Periodicity of ionisation energies
More informationChapter 25 Organic and Biological Chemistry
Chapter 25 Organic and Biological Chemistry Organic Chemistry The chemistry of carbon compounds. Carbon has the ability to form long chains. Without this property, large biomolecules such as proteins,
More informationChapter 21: Hydrocarbons Section 21.3 Alkenes and Alkynes
Section 21.1 Introduction to Hydrocarbons Section 1 Objectives: Explain the terms organic compound and organic chemistry. Section 21.2 Alkanes Chapter 21: Hydrocarbons Section 21.3 Alkenes and Alkynes
More informationElectrophilic substitution Both words needed Ignore minor misspellings 1
M.(a) Electrophilic substitution Both words needed Ignore minor misspellings (b) (i) Sn / HCl OR H 2 / Ni OR H 2 / Pt OR Fe / HCl OR Zn / HCl OR SnCl 2 / HCl Ignore conc or dil with HCl, Allow (dil) H
More informationPage 2. (1)-methylethyl ethanoate OR. Propan-2-yl ethanoate Ignore extra or missing spaces, commas or hyphens 1. (ii) M4 for 3 arrows and lp
M.(a) (i) (CH 3 ) 2 CHOH + (CH 3 CO) 2 O CH 3 COOCH(CH 3 ) 2 + CH 3 COOH Allow CH 3 CO 2 CH(CH 3 ) 2 and CH 3 CO 2 H Ignore (CH 3 ) 2 C in equation ()-methylethyl ethanoate OR Propan-2-yl ethanoate Ignore
More informationCandidates answer on the question paper. Time: 1 hour 15 minutes Additional Materials: Data Sheet for Chemistry (Inserted) Scientific calculator
SPECIMEN Advanced GCE CEMISTRY A F324 QP Unit F324: Rings, Polymers and Analysis Specimen Paper Candidates answer on the question paper. Time: 1 hour 15 minutes Additional Materials: Data Sheet for Chemistry
More information2 Set up an apparatus for simple distillation using this flask.
The following instructions are from an experimental procedure for the preparation of cyclohexene from cyclohexanol and concentrated phosphoric acid. Read these instructions and answer the questions that
More informationExam 1 (Monday, July 6, 2015)
Chem 231 Summer 2015 Assigned Homework Problems Last updated: Friday, July 24, 2015 Problems Assigned from Essential Organic Chemistry, 2 nd Edition, Paula Yurkanis Bruice, Prentice Hall, New York, NY,
More informationCHEMISTRY 2814/01 Chains, Rings and Spectroscopy
THIS IS A LEGAY SPEIFIATION ADVANED GE HEMISTRY 2814/01 hains, Rings and Spectroscopy *OE/T69510* andidates answer on the question paper OR Supplied Materials: Data Sheet for hemistry (inserted) Other
More informationName this organic reagent and state the conditions for the preparation. Reagent... Conditions (3)
1. (a) Propanoic acid, C 3 C 2 COO, can be prepared from carbon dioxide and an organic reagent. Name this organic reagent and state the conditions for the preparation. Reagent... Conditions...... (3) (b)
More informationabc Mark Scheme Chemistry 6421 General Certificate of Education CHM examination January series Further Physical and Organic Chemistry
Version : 3/0/07 abc General Certificate of Education Chemistry 64 CM4 Further Physical and rganic Chemistry Mark Scheme 007 examination January series Mark schemes are prepared by the Principal Examiner
More informationOption G: Further organic chemistry (15/22 hours)
Option G: Further organic chemistry (15/) TOK: The relationship between a reaction mechanism and the experimental evidence to support it could be discussed. See 16... Core material: G1 G8 are core material
More information12.1 The Nature of Organic molecules
12.1 The Nature of Organic molecules Organic chemistry: : The chemistry of carbon compounds. Carbon is tetravalent; it always form four bonds. Prentice Hall 2003 Chapter One 2 Organic molecules have covalent
More informationCambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level *0516596213* CEMISTRY 9701/42 Paper 4 A Level Structured Questions February/March 2016 2 hours Candidates
More informationCalculate a rate given a species concentration change.
Kinetics Define a rate for a given process. Change in concentration of a reagent with time. A rate is always positive, and is usually referred to with only magnitude (i.e. no sign) Reaction rates can be
More informationAlkyl phenyl ketones are usually named by adding the acyl group as prefix to phenone.
Aldehydes, Ketones and Carboxylic Acids Nomenclature of aldehydes and ketones Aldehydes: Often called by their common names instead of IUPAC names. Ketones: Derived by naming two alkyl or aryl groups bonded
More informationUNIT 4 REVISION CHECKLIST CHEM 4 AS Chemistry
UNIT 4 REVISION CHECKLIST CHEM 4 AS Chemistry Topic 4.1 Kinetics a) Define the terms: rate of a reaction, rate constant, order of reaction and overall order of reaction b) Deduce the orders of reaction
More informationDO NOT ALLOW any reference to spatial/space
Question Answer Mark Guidance 1 (a) (i) (compounds or molecules having the) same molecular 1 ALLOW different structure OR different displayed formula but different structural formulae formula OR different
More informationTable 8.2 Detailed Table of Characteristic Infrared Absorption Frequencies
Table 8.2 Detailed Table of Characteristic Infrared Absorption Frequencies The hydrogen stretch region (3600 2500 cm 1 ). Absorption in this region is associated with the stretching vibration of hydrogen
More informationREACTIONS OF AROMATIC COMPOUNDS
A STUDENT SHOULD BE ABLE TO: REACTIONS OF AROMATIC COMPOUNDS 1. Predict the product(s) of Electrophilic aromatic substitution (EAS): halogenation, sulfonation, nitration, Friedel- Crafts alkylation and
More informationAfternoon Time: 1 hour 30 minutes
ADVANED GE 2814/01 EMISTRY hains, Rings and Spectroscopy TURSDAY 12 JUNE 2008 Afternoon Time: 1 hour 30 minutes *UP/T68366* andidates answer on the question paper Additional materials (enclosed): Data
More informationTuesday 19 June 2012 Afternoon
Tuesday 19 June 2012 Afternoon A2 GCE CEMISTRY A F324 Rings, Polymers and Analysis *F314730612* Candidates answer on the Question Paper. CR supplied materials: Data Sheet for Chemistry A (inserted) ther
More information334/01 CHEMISTRY CH4. A.M. MONDAY, 23 January (1 hour 40 minutes)
Candidate Name Centre Number Candidate Number WELSH JOINT EDUCATION COMMITTEE General Certificate of Education Advanced CYD-BWYLLGOR ADDYSG CYMRU Tystysgrif Addysg Gyffredinol Uwch 334/01 CHEMISTRY CH4
More informationCambridge Assessment International Education Cambridge International Advanced Subsidiary and Advanced Level. Published
Cambridge Assessment International Education Cambridge International Advanced Subsidiary and Advanced Level CHEMISTRY 970/4 Paper 4 A Level Structured Questions 207 MARK SCHEME Maximum Mark: 00 Published
More informationORGANIC - EGE 5E CH. 2 - COVALENT BONDING AND CHEMICAL REACTIVITY
!! www.clutchprep.com CONCEPT: HYBRID ORBITAL THEORY The Aufbau Principle states that electrons fill orbitals in order of increasing energy. If carbon has only two unfilled orbitals, why does it like to
More informationChemistry of Benzene: Electrophilic Aromatic Substitution
Chemistry of Benzene: Electrophilic Aromatic Substitution Why this Chapter? Continuation of coverage of aromatic compounds in preceding chapter focus shift to understanding reactions Examine relationship
More information3.8 Aldehydes and ketones
3.8 Aldehydes and ketones Introduction: p's to p's Like the alkenes, the carbonyl group consists of a s bond and a p bond between the carbon and oxygen: Oxygen is more electronegative than carbon meaning
More informationmust show C=C Penalise sticks once per pair 1 H 10 Penalise sticks once per pair 1 or CH 3 C 2 Penalise sticks once per pair 1
M. (a) A allow CH COCH B must show C=C Penalise sticks once per pair (b) C CH CH CH CH CH D NOT cyclopentane which is only C 5 H 0 Penalise sticks once per pair (c) E CH CH COOCH Allow C H 5 CO CH F CH
More informationFinal. Mark Scheme. Chemistry CHEM4. (Specification 2420) Unit 4: Kinetics, Equilibria and Organic Chemistry
ERRY ILL TUITI AQA EMISTRY A2 PAPER 30 MARK SEME Question : /A Question 2: /A Question 3: /A General ertificate of Education (A-level) June 203 hemistry EM4 (Specification 2420) Unit 4: Kinetics, Equilibria
More informationBoardworks A2 Chemistry
Boardworks A2 Chemistry Organic Synthesis 34 slides 13 Flash activities Optical isomerism Introduction to light waves Animation illustrating the nature of polarized light Optically active compounds, enantiomers
More informationJUNIOR COLLEGE CHEMISTRY DEPARTMENT EXPERIMENT 14 SECOND YEAR PRACTICAL. Name: Group: Date:
JUNIOR COLLEGE CHEMISTRY DEPARTMENT EXPERIMENT 14 SECOND YEAR PRACTICAL Name: Group: Date: This practical will serve as (i) an introduction to aromatic chemistry and (ii) a revision of some of the reactions
More informationIntroduction to Organic Chemistry. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Introduction to Organic Chemistry Copyright The McGraw-ill Companies, Inc. Permission required for reproduction or display. 1 Common Elements in Organic Compounds 2 Classification of ydrocarbons ydrocarbons
More informationMark Scheme (Results) January 2018
Scheme (Results) January 2018 Pearson Edexcel International Advanced Level In Chemistry (WCH05) Paper 01 General Principles of Chemistry ll Transition Metals and Organic Nitrogen Chemistry Edexcel and
More informationF324: Rings, Polymers and Analysis Arenes
F324: Rings, Polymers and Analysis 4.1.1. Arenes 1. A chemist was investigating the reactions of benzene, phenol and cyclohexene with bromine. She found that they all reacted with bromine but under different
More informationMark Scheme (Results) June 2010
Scheme (Results) June 010 GCE GCE Chemistry (6CH05/01) Edexcel Limited. Registered in England and Wales No. 4496750 Registered Office: One90 High Holborn, London WC1V 7BH Edexcel is one of the leading
More informationOrganic Chemistry SL IB CHEMISTRY SL
Organic Chemistry SL IB CHEMISTRY SL 10.1 Fundamentals of organic chemistry Understandings: A homologous series is a series of compounds of the same family, with the same general formula, which differ
More informationAnswers to Assignment #5
Answers to Assignment #5 A. 9 8 l 2 5 DBE (benzene + 1 DBE) ( 9 2(9)+2-9 8+1+1 = 10 ˆ 5 DBE) nmr pattern of two doublets of equal integration at δ7.4 and 7.9 ppm means the group (the δ7.9 shift) IR band
More informationArenes occur naturally in many substances, and are present in coal and crude oil. Aspirin, for example, is an aromatic compound, an arene: HO
Naming Aromatic compounds contain one or more benzene rings (while aliphatic compounds do not contain benzene rings). Another term for a compound containing a benzene ring is arene. The basic benzene ring,
More informationOCR (A) Chemistry A-level. Module 6: Organic Chemistry and Analysis
OCR (A) Chemistry A-level Module 6: Organic Chemistry and Analysis Organic Synthesis Notes by Adam Robertson DEFINITIONS Heterolytic fission: The breaking of a covalent bond when one of the bonded atoms
More information4 ALLOW sugar from equation
Question Expected Answers Marks Additional Guidance 1 (a) method 1: fermentation of sugars or carbohydrates R reaction with yeast with sugar or carbohydrates 6 12 6 2 2 5 + 2 2 4 ALLW sugar from equation
More informationChapter 1 Reactions of Organic Compounds. Reactions Involving Hydrocarbons
Chapter 1 Reactions of Organic Compounds Reactions Involving Hydrocarbons Reactions of Alkanes Single bonds (C-C) are strong and very hard to break, therefore these compounds are relatively unreactive
More informationOrganic and Biochemical Molecules. 1. Compounds composed of carbon and hydrogen are called hydrocarbons.
Organic and Biochemical Molecules 1. Compounds composed of carbon and hydrogen are called hydrocarbons. 2. A compound is said to be saturated if it contains only singly bonded carbons. Such hydrocarbons
More informationAP Chemistry Chapter 22 - Organic and Biological Molecules
AP Chemistry Chapter - Organic and Biological Molecules.1 Alkanes: Saturated Hydrocarbons A. Straight-chain Hydrocarbons 1. Straight-chain alkanes have the formula C n H n+. Carbons are sp hybridized The
More informationChirality, Carbonyls and Carboxylic Acids
hirality, arbonyls and arboxylic Acids Questions on this unit may include material from UNIT 2 see syllabus Isomerism Structural isomerism. Structural isomerism was dealt with in UNIT 2. All isomers are
More informationMark Scheme (Results) January 2008
Mark Scheme (Results) January 008 GCE GCE Chemistry (645) Paper 1 Edexcel Limited. Registered in England and Wales No. 4496750 Registered Office: One90 High Holborn, London WC1V 7BH General Marking Guidance
More informationIGNORE Just benzene has a delocalised ring Benzene does not have C=C double bonds Any references to shape/ bond angles. Acceptable Answers Reject Mark
1(a) All carbon to carbon bonds same length/ longer C-C and shorter C=C not present 1 IGNORE Just benzene has a delocalised ring Benzene does not have C=C double bonds Any references to shape/ bond angles
More information17 Alcohols H H C C. N Goalby chemrevise.org 1 H H. Bond angles in Alcohols. Boiling points. Different types of alcohols H 2 C CH 2 CH 2
17 Alcohols General formula alcohols n 2n+1 Naming Alcohols These have the ending -ol and if necessary the position number for the group is added between the name stem and the ol If the compound has an
More information1. Which compound would you expect to have the lowest boiling point? A) NH 2 B) NH 2
MULTIPLE CICE QUESTINS Topic: Intermolecular forces 1. Which compound would you expect to have the lowest boiling point? A) N 2 B) N 2 C) N D) E) N Ans: : N 2 D Topic: Molecular geometry, dipole moment
More information18.1 Arenes benzene compounds Answers to Exam practice questions
Pages 230 232 1 a) Benzene has a planar molecule ; with six carbon atoms in a regular hexagon. Each carbon atom forms a normal covalent ( ) bond with its two adjacent carbons atoms and a hydrogen atom.
More informationCHEM4. General Certificate of Education Advanced Level Examination January Kinetics, Equilibria and Organic Chemistry
Centre Number Surname Candidate Number For Examiner s Use Other Names Candidate Signature Examiner s Initials General Certificate of Education Advanced Level Examination January 2010 Question 1 2 Mark
More informationLook for absorption bands in decreasing order of importance:
1. Match the following to their IR spectra (30 points) Look for absorption bands in decreasing order of importance: a e a 2941 1716 d f b 3333 c b 1466 1.the - absorption(s) between 3100 and 2850 cm-1.
More information