2 marksFunctional Group Analysis, Reactions and Mechanisms

CAPE Chemistry Unit 2 · 2015 · Paper 2 · Question 1(a)(iii)

Propane is cracked in industry according to: 2 CH3CH2CH3 (g) --A--> B (g) + C (g) + CH2=CH2 (g) + H2 (g).

Write the condensed structural formulae of B and C.

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Other parts of this question

1(a)(i)Identify the process represented by the equation.[1 mark]
1(a)(ii)State the conditions at A.[1 mark]
1(b)(i)Account for the tetravalency of the carbon atom.[2 marks]
1(b)(ii)Using appropriate notation and equations, explain the steps involved in the mechanism of the chemical reaction of aqueous bromine with propane (in sunlight) OR…[4 marks]
1(b)(iii)Name the mechanism of the reaction selected in (b)(ii).[1 mark]
1(c)(i)Describe the observations expected when aqueous bromine is added to liquid heptane (in sunlight).[2 marks]
1(c)(ii)Describe the observations expected when acidified potassium permanganate solution is added to liquid heptene (without sunlight).[2 marks]

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