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NJC/PRELIM2009/P1/Q23Which sequence correctly represents the compounds in the order of increasing pK a values?AClCOHOHOHHCH 3ClBCOHCH 3ClCHOHClClOHOHOHCHOHDClOHCH 3ClCOHOHClHCH 3NJC/PRELIM2009/P1/Q24How many chiral centres are present in the major product formed when compound S undergoes areaction with KBr and concentrated H 2 SO 4 at high temperature?H 3 CCH 3HOCH 3SA 6B 7C 8D 9© SAJC Chemistry Unit 2009 44
NJC/PRELIM2009/P1/Q25Compound P is used in the following synthesis.CH 2 OHCOCH 2 CH 2 OHexcessconc. H 2 SO 4heatDQBr 2 (aq)ERPWhat is the likely structure of the final product R?ABrCH 2 OHCOCHOHCH COCH(OH)CH 2 Br 2BrCCH 2 OHCOCHBrCH 3BrBCH 2 OHCOCHBrCH 2 BrDCH 2 OHCOCHOHCH COCH(OH)CH 2 Br 2BrBrNJC/PRELIM2009/P1/Q26Compound N is a product formed from the reaction between an alcohol and hot acidified potassiummanganate(VII).Compound N gives no yellow precipitate with alkaline iodine evolves a colourless gas when treated with aqueous sodium carbonate reacts with 2 moles of PCl 5 to give white fumesWhat is the structural formula of the alcohol?ABCDCH 3 COCH 2 CH 2 COOHCH 3 CH(OH)CH 2 CH 2 CH 2 OH(CH 3 ) 2 C(OH)CH 2 COOH(CH 3 ) 2 C(OH)CH 2 CH 2 OH© SAJC Chemistry Unit 2009 45
Page 6 and 7: AJC/PRELIM 2009/P1/Q2121 Which of t
Page 8 and 9: AJC/PRELIM 2009/P1/Q2626 Which of t
Page 10 and 11: IJC/PRELIM 2009/P1/Q1515 Which of t
Page 12 and 13: CDIJC/PRELIM 2009/P1/Q1919 Concentr
Page 14 and 15: 23 A mixture of amino acids can be
Page 16 and 17: IJC/PRELIM 2009/P1/Q2525 Enols, als
Page 18 and 19: CJC/PRELIM 2009/P1/Q2222 A product
Page 20 and 21: CJC/PRELIM 2009/P1/Q2727 Which of t
Page 22 and 23: CJC/PRELIM 2009/P1/Q3030 A useful o
Page 24 and 25: JJC/PRELIM 2009/P1/Q2020. The struc
Page 26 and 27: JJC/PRELIM 2009/P1/Q2424. Which com
Page 28 and 29: JJC/PRELIM 2009/P1/Q2828. Compound
Page 30 and 31: DHS/PRELIM 2009/P1/Q2323 A student
Page 32 and 33: DHS/PRELIM 2009/P1/Q2727 What is th
Page 34 and 35: OH 3 COCH 3OH 3 COHow many stereois
Page 36 and 37: OHCH 3OGOA It gives white fumes of
Page 38 and 39: How many moles of dilute NaOH are r
Page 40: MI/PRELIM 2009/P1/Q28A sequence of
Page 47 and 48: NJC/PRELIM2009/P1/Q29Which syntheti
Page 49 and 50: NYJC/PRELIM2009/P1/Q23Which one of
Page 51 and 52: AOCOCH 3BCH 2 OCOCH 3CCOOCH 2 CH 3D
Page 53: PJC/PRELIM2009/P1/Q21PJC/PRELIM2009
Page 56 and 57: PJC/PRELIM2009/P1/Q25© SAJC Chemis
Page 58 and 59: PJC/PRELIM2009/P1/Q27PJC/PRELIM2009
Page 60 and 61: RIJC/PRELIM2009/P1/Q19RIJC/PRELIM20
Page 66 and 67: CH 3HO (CH 2 ) 4 CH 3CH 3 - O (CH 2
Page 68 and 69: CH(OH)CH 3D+ alkaline aqueous iodin
Page 70 and 71: D 9 4SRJC/PRELIM2009/P1/Q23Which of
Page 72 and 73: CH 2 CH 2 CO 2 H│(CH 3 ) 2 CHCH(N
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Page 78 and 79: VJC/PRELIM2009/P1/Q19The hydride io
Page 80 and 81: VJC/PRELIM2009/P1/Q24Which process
Page 82 and 83: VJC/PRELIM2009/P1/Q26Compound X is
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Page 90 and 91: MCQ - Section BACJC/PRELIM 2009/P1/
Page 92 and 93: 3 The enthalpy change of hydrogenat
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CJC/PRELIM 2009/P1/Q3939 Which of t
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eaction is involved?1 nucleophilic
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2 (C 2 H 5 ) 2 NH3 (C 2 H 5 ) 3 NDH
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HCI/PRELIM 2009/P1/Q3939 Compound F
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2CONH 2CH 2 OHNH 23OH, , ,OHNJC/PRE
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2 It reacts with metallic sodium3It
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PJC/PRELIM2009/P1/Q40© SAJC Chemis
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RIJC/PRELIM2009/P1/Q39RIJC/PRELIM20
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SAJC/PRELIM2009/P1/Q40Compound Q, w
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TPJC/PRELIM2009/P1/Q38TPJC/PRELIM20
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Which statements about pravastatin
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YJC/PRELIM2009/P1/Q40© SAJC Chemis
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