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23 A mixture of amino acids can be separated by electrophoresis.Mixture ofamino acidsfilter paperThe following information about alanine and two other amino acids are given asbelow.Amino acid Structure Isoelectric pointalanine (ala)H 2 NHC COOH 6.01CH 3Hglutamine (gln)H 2 NCCOOH 5.65CH 2 CH 2 CONH 2Hlysine (lys)H 2 NCCOOH 9.74(CH 2 ) 4 NH 2Which of the following filter papers show a possible result of the separation of theamino acid mixture at pH 8?© SAJC Chemistry Unit 2009 14
Aanodecathodelysgln alaBanodecathodeala glnlysCanodecathodelysala glnDanodecathodegln alalysIJC/PRELIM 2009/P1/Q2424 In which of the following sequences does the value of pK a increase continuously?ABCDCH 3 CHClCOOH, CH 3 CH 2 COOH, C 6 H 5 OHCH 2 ClCH 2 COOH, CH 3 CHClCOOH, CH 3 CH 2 COOHC 6 H 5 OH, CH 3 CHClCOOH, CH 3 CHFCOOHCH 3 CH 2 COOH, CH 3 CHFCOOH, CH 3 CF 2 COOH© SAJC Chemistry Unit 2009 15
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 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 44 and 45: NJC/PRELIM2009/P1/Q23Which sequence
Page 47 and 48: NJC/PRELIM2009/P1/Q29Which syntheti
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Page 56 and 57: PJC/PRELIM2009/P1/Q25© SAJC Chemis
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RIJC/PRELIM2009/P1/Q29RIJC/PRELIM20
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CH 3HO (CH 2 ) 4 CH 3CH 3 - O (CH 2
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CH(OH)CH 3D+ alkaline aqueous iodin
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D 9 4SRJC/PRELIM2009/P1/Q23Which of
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CH 2 CH 2 CO 2 H│(CH 3 ) 2 CHCH(N
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TPJC/PRELIM2009/P1/Q20TPJC/PRELIM20
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VJC/PRELIM2009/P1/Q19The hydride io
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VJC/PRELIM2009/P1/Q24Which process
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VJC/PRELIM2009/P1/Q26Compound X is
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YJC/PRELIM2009/P1/Q18YJC/PRELIM2009
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MCQ - Section BACJC/PRELIM 2009/P1/
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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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Which statements about pravastatin
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YJC/PRELIM2009/P1/Q40© SAJC Chemis
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