Exercise 1 Answers

a)

i) 1 and 4

ii) 1 and 4

 

b)

i) 1

ii) 2

c)

i) one pi bond is broken and two sigma bonds are formed

ii) two pi bonds are broken and four sigma bonds are formed

d)

bond breaking needs energy, formation gives out energy, hence net one bond is broken and two are formed hence it should be exothermic. (without considering the energy needed for dissociation of the reagent)

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