Banner 1 C11.1 Carbon Compounds AQA AS Chemistry C11 Introduction To Organic Chemistry Kerboodle: Page No. 180 1.Ans-

a.0.4 mol

b 1.0 mol

c C₂H₅

d .C₄H₁₀

11.2 Nomenclature-naming organic compoundsAQA AS Chemistry C11 Introduction To Organic Chemistry Kerboodle: Page No. 185

1.Ans-

a 1-chloropropane

b pentane

c pent-2-ene

d 2-methylpentane

2.

a methylbutanone

b but-2-ene

c 2-chlorohexane

d but-1-ene.

11.3 IsomerismAQA AS Chemistry C11 Introduction To Organic Chemistry Kerboodle : Page No. 187

1.Ans- What type of structural isomerism is shown by the following pairs of molecules? Choose from: A – functional groups at different points, B = different functional groups, C = chain branching. a B = different functional groups

b functional groups at different points

c C = chain branching

2 .Ans-

 b.Ans- hexane

2-methylpentane

3-methylpentane

2,2-dimethylbutane

2,3-dimethylbutan

4.Ans- a Give the name of this:

E-pent-2-ene

b.Ans-

Z-pent-2-ene

Practice questions: Page No. 188-189 1. Ans-

a) (i) Molecule or compound which consists of

Hydrogen and carbon only

(ii) C_nH_2n+2

(iii) C₆H₁₄

b. any two from:

• Chemically similar / react in same way

• Differ by CH2

• Same functional group

• Gradation in physical properties or specified trend, e.g. b.p.

(c) (i) Same molecular formula and different structural formula

(ii) 2-methylpentane

2,2-dimethylbutane

(iii)

d)

(i) % by mass of H = 7.70%

mol H = 7.70 / 1 = 7.70

mol C = 92.3 / 12 = 7.69

ratio 1 : 1 → CH

(ii)

CH has empirical mass of 13 and 78/13 = 6 → C₆H₆

2 a) Dichlorodifluoromethane

b) Tetrachloromethane

c) 1,1,2,2-tetrachloroethane 3.Ans-

a)

any two from:

• appropriate structure for pent-2-ene

• appropriate structure for 2-methylbut-2-ene

• appropriate structure for 3-methylbut-l-ene

(b)

Y = 2-bromo-2-methylbutane

4 There are four structural isomers of molecular formula C^HgBr. The structural formulae of two of these isomers are given below.

(i)

(ii)

2-bromo-2-methylpropane

5 (a)

2-bromo-2,3-dimethylbutane

Stronger / more vdw (forces) between molecules (of 1-bromohexane) (b)

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