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Papers included in this bank - ASKnLearn

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2 (C 2 H 5 ) 2 NH3 (C 2 H 5 ) 3 NDHS/PRELIM 2009/P1/Q3838 The compound below is B<strong>in</strong>apacryl which is often used as a fungicide.OHCH 3O 2 NNO 2CH 3Which of the follow<strong>in</strong>g statement(s) is/are true about the fungicide?1 It undergoes a more vigorous reaction with potassium metal thansodium metal.2 It reacts with ethanoic acid <strong>in</strong> the presence of concentrated sulfuricacid to give a pleasant smell<strong>in</strong>g liquid.3 It cannot exist as a racemic mixture .DHS/PRELIM 2009/P1/Q3939 Vitam<strong>in</strong> B5 has the follow<strong>in</strong>g structure.OHNHOHOH 3 C CH 3O OHWhich of the follow<strong>in</strong>g statement(s) correctly describe the chemistry ofVitam<strong>in</strong> B5?1 Vitam<strong>in</strong> B5 reacts with 3 moles of PCl 5 .2 The carboxylic acid group reacts with CH 3 NH 2 to form an amide.3 Vitam<strong>in</strong> B5 reacts with 2 moles of HCN.DHS/PRELIM 2009/P1/Q4040 Psiloc<strong>in</strong> is a psychedelic mushroom alkaloid. It is the active compoundthat produces halluc<strong>in</strong>ations from <strong>in</strong>gest<strong>in</strong>g “magic mushrooms” andamplifies sensory experience. Compound Y is a derivative of Psiloc<strong>in</strong>.© SAJC Chemistry Unit 2009 98

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