Section 1.1 Section 1.2 Section 1.3 - The Student Room

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SECTION 12 11 butane methylpropane 12 a C 5 H 12 + 8O 2 Æ 5CO 2 + 6H 2 O b C 5 H 12 + 5 O 2 Æ 5CO + 6H 2 O 13 a For ‘cat’ cracking, high temperature (500 °C) and zeolite catalyst. For steam cracking, high temperature (900 °C) with short residence time and steam as dilutent. b True: (ii), (iv), (v) c Three from: + + + + 14 a A B C D E bD c A d B e Cand E f eg C or E could have been produced by cracking D + gA Section 12.2 1 a b c 3 a b c d e d 2 a propene b hept-2-ene c 2-methylbut-2-ene d hept-1,4-diene e 2,4-dimethylpent-2-ene f cyclopentene 4 e H H CH 3 H H C C C C C H CH 3 H H H 193
SECTION 12 5 a H H H Br Br + 2Br 2 Br Br H C C C + Br 2 H C C C H H H H H H H + H 2 One of the carbon atoms has become positively b H H H H H Br H C C C + H 8 a Bromine; room temperature; non polar solvent 2 H C C C H b Steam; catalyst, phosphoric acid on silica; 300 °C; high H H H H H H pressure (60 atm) c Hydrogen; catalyst, nickel; 150 °C; 5 atm pressure; 6 H Br H H H Br (or platinum at lower temperatures and atmospheric pressure) H C C C H H C C C H d Hydrogen; catalyst, nickel; 150 °C. H H H H H H 9 a H H H H 7 a C C H C + C + Br 2 H H d+ H H H Br Br d– Br b Br H H H H + Br 2 (aq) H C + C H C C H c OH H H H Br + HBr – Br Br b The hydrogen bromide is polarised with the hydrogen d + 2H atom being slightly positively charged. The hydrogen 2 atom behaves as an electrophile and reacts with the e double bond. charged and so it reacts with the bromide ion to form a C–Br covalent bond. 10 Shake the compound with about 1 cm depth of bromine water in a stoppered test-tube. If the compound is unsaturated, the bromine will be decolorised. The reaction occurs quickly at room temperature. f Br Br – Section 12.3 1 a i 1,4-dimethylbenzene ii 1-ethy1-3-methylbenzene iii 1,2,4-trimethylbenzene d Cl e b i ii iii Cl 2 a 1,3,5-trimethylbenzene b 1-methyl-3-propylbenzene c bromobenzene d 1,3-dinitrobenzene e 4-methylphenylamine f 2,6-dimethylphenol 3 a b c OH 4 a 0.154 nm The ring is not a regular hexagon, but has alternating 0.134 nm long and short bonds. b c All the bonds in the ring are the same and so only one isomer is possible. CH 3 CH 3 194
Page 1 and 2: SECTION 1 Section 1.1 1 a 2.0 b 5.3
Page 3 and 4: SECTION 2 Section 2.2 1 a 238 234 9
Page 5 and 6: SECTION 3 Section 3.2 1 a Li(g) bec
Page 7 and 8: SECTION 3 Section 3.5 1 F F 4 a F 2
Page 9 and 10: SECTION 4 CH 3 CHO(l) +2 O 2 (g)
Page 11 and 12: SECTION 4 Section 4.6 1 a i Li(s) +
Page 13 and 14: SECTION 5 Section 5.1 1 a Ca 2+ (aq
Page 15 and 16: SECTION 5 5 a H H H c H b H O H C H
Page 17 and 18: SECTION 6 5 a In ionic substances,
Page 19 and 20: SECTION 6 7 Accurate atomic masses
Page 21 and 22: SECTION 7 Section 7.2 1 a 0.09 5 a
Page 23 and 24: SECTION 8 Section 7.7 1 a i AgI(s)
Page 25 and 26: SECTION 9 2 a Buffer solutions are
Page 27 and 28: SECTION 10 Section 10.1 1 a b c A r
Page 29 and 30: SECTION 11 Section 11.2 1 Element T
Page 31: SECTION 12 Section 11.6 1 a 2 b 4 c
Page 35 and 36: SECTION 13 6 a H H H H H C C I + OH
Page 37 and 38: SECTION 13 Section 13.4 1 a A butan
Page 39 and 40: SECTION 13 6 a O O CH 3 CH 2 OH + C
Page 41 and 42: SECTION 13 6 a H H OH b H H OH H H
Page 43 and 44: SECTION 14 Section 13.10 1 a + - NH
Page 45 and 46: SECTION 14 5 a i Reagents and condi
Page 47: SECTION 15 Section 15.5 1 a Many of

Section 1.1 Section 1.2 Section 1.3 - The Student Room

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