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(a)

www.Xtrem

ePapers.c

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Fig. 1

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Fig. 2

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(a)

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(b)

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Organic Chemistry 2 page 1

Core 1

(i) 100

(ii) addition or polymerisation

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Organic Chemistry 2 page 2

Extension 1

a burning forms carbon dioxidephotosynthesis uses up the gas or plant (growth) uses up gasthe two balance or are in equilibrium

b(i) bromine(water)brown / orange / yellowturns to colourless

or

potassium manganatepurple / pinkturns to colourless or green for alkaline reagent

(ii) hydrolyse or saponification or heat (for correct reagent)sodium hydroxide or alkali

(iii) hydrogen

c any two of thesehydrogen has lowest Mrlowest densityhighest molecular speedslightest molecules

it is lightest gas

d(i) good conductor ductile or malleable

(i) one ofinsulator or poor conductor

one ofeasily shaped or flexible or not biodegradable or unreactive or durable

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Organic Chemistry 2 page 3

Extension 2

a(i) ester or polyester

(ii) fats or vegetable oils or lipids

b -NHCO(CH2)4CONH(CH2)6NHCO-

or -NHCO--CONH--NHCO-

or -NHCO--NHCO--NHCO-

c(i) carbon, hydrogen and oxygen

(ii) --------

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Organic Chemistry 2 page 4

Extension 3

(i) addition or addition polymerisation

(ii) correct repeat unit showing branched CH3

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Organic Chemistry 2 page 5

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a(i) correct formula of an isomer

CH3.CH2.CHBr.CH3

or CH3.CH(CH3).CH2Bror (CH3)3CBr

(ii) any correct formula for a dibromomethane

(iii) butene

bromine

b correct formula CH3Cl showing 8e around C and Cl and 2e around hydrogen

c(i) butanol or butan-1-ol

(iii) correct reagent and resultsilver nitrate cream or off-white precipitatelead nitrate yellow precipitatechlorine goes brown / orange / yellowmanganate (VII) purple to colourless / green / browndichromate (VI) orange to green

(iv) halide was iodidecolour due to iodine

d(i) iodobromochloro

(ii) any two ofslower ratesmaller concentrationfewer particlesfrequency of collision

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Organic Chemistry 2 page 6

Extension 5

a(i) acidhydrolysis

(ii) any three of theseyeast or enzymes such as zymasefermentationaqueous solutionword equationsymbol equation

b propanoic acidCH3CH2COOH